20-Letter Words Containing: O,S,I
(In Any Order)
There are 129 20 letter words,
887 20 letter phrases and
0 20 letter abbr's with
O,S,I in.
Best Scoring 20 Letter Words With: O,S,I
| Expand? | Word | Save? | Length | Usage | Points | Type | |
|---|---|---|---|---|---|---|---|
We couldn't find any valid Scrabble US words with a length of 20. Try changing the version of the game.
Tip: Scrabble EU allows far more words than US! | |||||||
All 20 Letter Words
Words (129)
overenthusiasticallyinstitutionalizationhypercholesterolemiaunsatisfactorinessesunderrepresentationsunconscionablenessesuncompromisingnessesultrasegregationistsultrarevolutionariesultramicroscopicallyultracentrifugationstransformationalistssyncategorematicallysuperspecializationsspectrophotometricalspectroheliographiesspectrofluorometriesrepresentationalistsrepresentationalismsreinstitutionalizingreindustrializationsreconceptualizationsradiopharmaceuticalsradioimmunoassayablepsychopharmacologistpsychopharmacologiespsychopathologicallypseudosophisticationpseudocholinesteraseprofessionalizationsplethysmographicallyphotoreconnaissancesphotophosphorylationphotointerpretationsphotodisintegrationsphosphofructokinasesphosphatidylcholinesphiloprogenitivenessphenylthiocarbamidesphenylpropanolaminesparadichlorobenzenespaleoanthropologistsoverprotectivenessesoverintellectualizesoverdifferentiationsnondestructivenessesnondenominationalismneuropsychiatricallyneurophysiologicallyneuropharmacologistsneuroendocrinologistneuroendocrinologiesmischaracterizationsmicropaleontologistsmicroelectrophoresismicroelectrophoresesmicrocrystallinitiesmagnetofluiddynamicslymphogranulomatosiskeratoconjunctivitesirreproachablenessesirreconcilablenessesinterstratificationsinterconnectednessesintellectualizationsinconsiderablenessesinconsequentialitiesincomprehensiblenessincommensurabilitiesimmunoprecipitationshyperparathyroidismshyperconsciousnesseshypercoagulabilitieshypercholesterolemichydrochlorothiazideshomotransplantationshistocompatibilitiesglomerulonephritidesexpressionlessnessesencephalomyocarditiselectrophysiologistselectrophysiologicalelectrophotographieselectrooculographieselectroluminescencesdimethylnitrosaminesdepartmentalizationsdeoxyribonucleotidesdeinstitutionalizingdeindustrializationsdehydrochlorinationscytodifferentiationscrystallographicallycountersurveillancescountermobilizationscounterintelligencescounterdemonstratingcounterconditioningsconventionalizationscontradistinguishingcomprehensiblenessesbacteriochlorophyllsantifluoridationistsanticonservationistsantiauthoritarianismanthropocentricitiesadrenocorticotropinsadrenocorticosteroidacetylcholinesterasesemiautobiographicalpseudohermaphroditicoophorosalpingectomynoninstitutionalizednoninstitutionalisednephroangiosclerosismagnetohydrodynamicslipochondrodystrophykeratoconjunctivitisinternationalisationincontrovertiblenessimmunohistochemistryhyperadrenocorticismhistoincompatibilityheterobasidiomycetesdestructive-metaboliccounterrevolutionistcounterdemonstrationcounter-revolutionistcompartmentalisationPhrases (887)
yellow-shafted flickerwoodrow wilson guthriewilliam wilkie collinswilliam stanley jevonswilliam lloyd garrisonwilliam hyde wollastonwilliam henry harrisonvirgil garnett thomsonvaricella zoster virusuniversity of nebraskatwo-dimensional figuretunisian monetary unittumour necrosis factortransportation systemthousand and one nightsthomas lanier williamstelopea speciosissimasuperfamily coccoideasuborder strepsirhinisuborder myxiniformessubclass lepidosauriasubclass commelinidaestephen collins fostersphenisciform seabirdsouthern united statessouth american countrysolidago multiradiatasoftware optimizationsocial justice warriorsir karl raimund poppersir james george frazersir charles wheatstonesingle-valued functionsimple harmonic motionsignature recognitionsense of right and wrongselective informationsedative-hypnotic drugsecond lateran councilsecond coming of christscomberomorus regalisscipio africanus majorschool superintendentsaponaria officinalissamuel rawson gardinersaint peter the apostlesaccharum officinarumrobert william servicerobert louis stevensonrhizopogon idahoensisresurrection of christresident commissionerrequirements contractrepublic of madagascarrepublic of kazakhstanrepublic of el salvadorreconstruction periodracial discriminationpsychological featurepseudotsuga menziesiiprumnopitys taxifoliaprofessional relationprinciple of parsimonyprescription medicinepollachius pollachiusplatanus occidentalisplasminogen activatorpierre simon de laplacephotographic emulsionpersonality inventorypersonal relationshippast progressive tensepass with flying colorsoryctolagus cuniculusorder sphenisciformesorder myxobacterialesorder mycelia steriliaorder heterotrichalesorder actinomycetalesorder accipitriformesobstruction of justicenymphicus hollandicusnutritionist's calorienicolas de malebrancheneisseria gonorrhoeaenasturtium officinalemilton snavely hersheymilitary installationmetallographic samplemental representationmasticophis flagellummaster of architecturemarket capitalisationmadonna louise cicconeluscinia megarhynchoslunar excursion moduleludwig mies van der rohelophophora williamsiiliving accommodationslinguistic competencelevisticum officinalelebanese monetary unitlateral epicondylitisklemens von metternichjudgement on the meritsjudgement of dismissaljoseph louis gay-lussacjean-baptiste poquelinjapanese monetary unitjames harold doolittleislamic calendar monthinstruction executionindochinese peninsulaindirect transmissionhylocichla fuscescenshomolosine projectionhenri toulouse-lautrechans christian oerstedgross national productgleditsia triacanthosgeorges henri lemaitregenus phoenicophoriumgenus ornithorhynchusgaultheria procumbensfundulus heteroclitusfriendly relationshipfrankenstein's monsterfouquieria columnarisfederation of malaysiafather of the submarinefamily tachyglossidaefamily pseudococcidaefamily passifloraceaefamily gasterosteidaeestonian monetary unitendogenous depressionemotional disturbanceeleocharis aciculariseicosapentaenoic acidedward williams morleyecological successiondouble-reed instrumentdivision tracheophytadisplacement reactiondianthus caryophyllusdemonstrative pronoundegenerative disorderctenocephalides caniscross-florida waterwaycortinarius violaceusconvolvulus scammoniacontradiction in termsconservation of matterconsecutive operationconfession of judgmentcomparative anatomistcommunity of interestscommercial instrumentcommercial enterprisecomedogenic substanceclassification systemclass hemiascomyceteschristopher isherwoodchlamydia trachomatischaradrius morinelluscentropus phasianinuscase-to-infection ratiocarter administrationcarson smith mccullerscardinal compass pointcaprimulgus vociferuscaprimulgus europaeuscapital of switzerlandcapital of south dakotacapital of south africacapital of sierra leonecapital of saudi arabiacapital of rhode islandcapital of mississippicapital of afghanistancalendula officinalisbyelorussian languagebusiness relationshipbusiness organizationbusiness organisationbroadcast programmingbritish pound sterlingbotswana monetary unitbotaurus lentiginosusblue ribbon commissionbasidiomycetous fungibaron snow of leicesteraustrian monetary unitaustralian bonytongueatmospheric conditionartemisia californicaarcheological remainsappendicular skeletonappalachian mountainsapostle of the gentilesapium graveolens dulceanemopsis californicaamsinckia grandifloraamerican harvest mouseambystomid salamanderambrose gwinett bierceambloplites rupestrisalice malsenior walkeralexander iii of russiaalessandro cagliostroaimee semple mcphersonageratum houstonianumadenosine diphosphateacquisition agreementaboriginal australianabatement of a nuisancezalophus californicusyosemite national parkyellow-leaf sickle pinexiphosurus polyphemusximenesia encelioidesxeroderma pigmentosumxenorhyncus asiaticusxanthosoma atrovirensxanthoma disseminatumwyethia helianthoidesworld trade center siteworkmen's compensationword processing systemwoolsorter's pneumoniawolstonian glaciationwilliam richard morriswilliam nunn lipscom jr.william felton russellwhite-throated sparrowwhite dog's-tooth violetwestern honey mesquitevoice in the wildernessvincetoxicum hirsutumvigdis finnbogadottirvestibule of the vaginavesicoureteral refluxverbesina encelioidesvena supratrochlearisvena labialis superiorvena labialis inferiorvena facialis anteriorvena cerebrum superiorvaleriana officinalisvaccinium caespitosumustilaginoidea virensuniversity of michiganuniversal propositionuniversal product codeuniversal gas constantunited states congressunited states air forceunited church of christungradable oppositiontwelve tribes of israeltriostium perfoliatumtrichosurus vulpeculatrichomanes speciosumtrichomanes reniformetransversus abdoministransorbital lobotomytranscortical aphasiatrack-to-track seek timetrachinotus carolinustoy manchester terriertoxic industrial wastetonsilla pharyngealistolypeutes tricinctustobias george smollettthysanopterous insectthorstein bunde veblentheory of dissociationtheodore francis powysthelonious sphere monktemporal lobe epilepsytelevision-camera tubetelevision pickup tubetelevision newscastertaurotragus derbianustartarian honeysuckletamiasciurus douglasisysteme internationalsystema respiratoriumsynchronous operationsymplocarpus foetidussympathetic vibrationsylvilagus floridanusswietinia macrophyllaswainsona grandifloraswainsona galegifoliasurvival of the fittestsupport vector machinesuperior rectus musclesuperior labial arterysuperior cerebral veinsuperfamily tineoideasuperfamily muscoideasudanese monetary unitsubornation of perjurysuborder sciuromorphasuborder plesiosauriasuborder heterostracisuborder cephalaspidasuborder anthropoideasubliminal perceptionsubfamily taxodiaceaesubfamily mimosoideaesubfamily hydromyinaesubfamily cabombaceaesubclass zoomastiginasubclass telosporidiasubclass discomycetessubclass branchiopodastylophorum diphyllumstrawberry hemangiomasteatornis caripensisstatute of limitationsstatistical procedurestandard transmissionstaffordshire terrierst. gregory of nazianzenspodoptera frugiperdasplit-half correlationspiranthes porrifoliasphenoidal fontanellespecial-interest groupspecial duty allowancespartina cynosuroidessouth american sea lionsource of illuminationsomatotrophic hormonesomatic sensory systemsomalian monetary unitsolidago sempervirenssolid-propellant motorsoleirolia soleiroliisoftware optimisationsodium orthophosphatesodium lauryl sulphatesocial stratificationsocial security numbersocial anthropologistsmiledon californicussmall magellanic cloudslip-tongue log skiddersisymbrium officinalesir oliver joseph lodgesir joseph john thomsonsir james young simpsonsir harold walter krotosir geoffrey wilkinsonsinusoidal projectionsingle-propeller planesiderochrestic anemiasideroblastic anaemiashort-billed marsh wrensexual discriminationsenior master sergeantsemiautomatic firearmself-propelled vehiclesecretary of educationsecond vatican councilsecond epistle of petersecond earl of guilfordsecond council of lyonsseborrheic dermatitisscutigera coleoptratascouting organizationscleroderma flavidiumscleroderma aurantiumscintillation counterscintillating scotomaschizopetalon walkerischeduled territoriessceloglaux albifaciesscaphiopus bombifronsscabiosa atropurpureasaxifraga stoloniferasaxifraga sarmentosamsanvitalia procumbenssanitation departmentsalvinia rotundifoliasalvelinus fontinalissalpichroa rhomboideasalah al-din battalionssaint james the apostlesaint francis of assisirumohra adiantiformisrubus idaeus strigosusround-spored gyromitrarocky mountains cherryrobert charles venturirhododendron viscosumrevolutions per minutereversing thermometerreuben lucius goldbergrespiratory infectionrespiratory alkalosisrequired reserve ratiorepublic of uzbekistanrepublic of tajikistanrepublic of seychellesreligious orientationreconstructive memoryreconnaissance by firereagan administrationquercus ellipsoidalispyridoxine 5'-phosphatepyramidal motor systempurse-string operationpublius vergilius maropterocarpus marsupiumpsychopsis kramerianapsychological warfarepsychological sciencepsychic communicationpseudococcus fragilisproportional samplingprofit and loss accountprofessional footballprofessional baseballprocessus coronoideusprivate security forceprince-of-wales featherprimary solid solutionprice-to-earnings ratiopresident george w. bushpotassium-argon datingpotassium bicarbonateposttraumatic amnesiaposterior labial veinspostal rate commissionpositive-degree adverbpositive magnetic poleporonotus triacanthuspopulus grandidentatapopulation commissionpolytechnic institutepolystichum setiferumpolystichum lonchitispolystichum aculeatumpolitical correctnesspodocarpus latifoliuspodocarpus ferrugineaplectrophenax nivalisplatte river penstemonpittsburgh of the southpilosella officinarumpiezoelectric crystalpierre-joseph proudhonphysostigma venenosumphysiological anatomyphysical anthropologyphlegmasia alba dolensphlebotomus papatasiiphilosophy departmentphilip warren andersonphilip dormer stanhopephaseolus multiflorusphalaropus fulicariusphalaenopsis amabilispersonal line of creditperonospora hyoscyamiperomyscus gossypinusperitonsillar abscessperisoreus canadensispercussion instrumentpenstemon whippleanuspenstemon linarioidespenicillin v potassiumpassiflora mollissimapassiflora maliformispassiflora laurifoliaparietomastoid suturepaper electrophoresispachyrhizus tuberosusortilis vetula macalliorthophosphorous acidorthopedic foot insoleorthogonal oppositionorganic brain syndromeorder torpediniformesorder scrophularialesorder of saint benedictorder lepidodendralesorder jungermannialesorder cycadofilicalesorder charadriiformesorder blastocladialesorder aristolochialesorange mushroom pimpleophioglossum pendulumoperation desert stormonobrychis viciifoliaoceanic whitetip sharkobtuse-angled triangleobject of a prepositionnurse-patient relationnuclear power industrynotropis atherinoidesnorthwest territoriesnorthern united statesnorth island edelweissnonviolent resistancenonrestrictive clausenonmalignant neoplasmniels henrik david bohrneurological disordernerve block anesthesianephrolepis pectinatanepalese monetary unitneoceratodus forsterinegotiable instrumentnecrotizing enteritisnecrobiosis lipoidicanarthecium ossifragumnaphthalene poisoningmyrmecobius fasciatusmyeloblastic leukemiamycoplasmal pneumoniamusical accompanimentmusculophrenic arterymumification necrosismountain standard timemountain lady's slippermortise-and-tenon jointmorphophonemic systemmorchella angusticepsmonofocal lens implantmonoblastic leukaemiamoment magnitude scalemolluscum contagiosummistletoe rubber plantmirabilis californicamildred ella didriksonmigratory grasshoppermicrosorium punctatummicropterus salmoidesmeriones unguiculatusmenyanthes trifoliatamelville weston fullermelilotus officinalismegaloblastic anaemiamaximilian's sunflowermasticophis lateralismarcus terentius varromanagement consultingmaidenhair spleenwortmagnesium bicarbonatemacrotus californicusmacronectes giganteusmacroclemys temminckilysichiton americanumlyrurus mlokosiewicziluis de gongora y argotelowest common multiplelouis victor de broglielouis eugene felix neellonicera sempervirenslofortyx californicuslipoid granulomatosisligustrum ovalifoliumlesser rhomboid muscleleptotyphlops humilislepidochelys olivacealeonotis nepetaefolialecture demonstrationlavandula officinalislasthenia chrysostomalaguncularia racemosalabiodental consonantkosteletzya virginicaklinefelter's syndromekingdom of saudi arabiakinetic theory of gasesketosis-prone diabeteskaspar friedrich wolffkaren danielsen horneyjournalist's privilegejoseph warren stilwelljoseph rudyard kiplingjohn augustus roeblingjohn addington symondsjapanese morning gloryjames douglas morrisonisthmus of tehuantepecisovolumetric processisidor feinstein stoneintravenous pyelogramintravenous injectionintransitive verb forminternational affairsinhalation anestheticinhalation anesthesiainferior rectus muscleindustrial revolutionindustrial psychologyinconvenience oneselfincentive stock optionimmediate constituenthyperkinetic syndromehypericum androsaemumhymenoxys grandiflorahylophylax naevioideshylactophryne augustihydrofluosilicic acidhydnocarpus wightianahyacinthus orientalishorizontal stabilizerhorizontal stabiliserhistiocytic leukaemiahippodamia convergenshimantopus himantopushibiscus rosa-sinensishexalectris warnockiiheterodyne oscillatorherschelian telescopeheracleum sphondyliumhelleborus orientalishelladic civilisationhelianthus petiolarisheat of transformationheat of solidificationharpullia cupanioideshare's-foot bristle fernhalicoeres bivittatusgypsophila paniculatagutierrezia sarothraeguernsey monetary unitgross domestic productgriselinia littoralisgregory goodwin pincusgreater peritoneal sacgraeco-roman wrestlinggooseneck loosestrifegolden-crested kingletgnaeus pompeius magnusgnaeus julius agricolaglaucous bristlegrassgiovanni schiaparelligiovanni battista cibogeranium richardsoniigeorge william russellgeometric progressiongeoffroea decorticansgenus reithrodontomysgenus ptilonorhynchusgenus pithecanthropusgenus hippoglossoidesgenus hamamelidoxylongenus gymnosporangiumgenus ctenocephalidesgenus corynebacteriumgenus aspidophoroidesgenus argentinosaurusgenus aegyptopithecusgenus acanthoscelidesgaussian distributiongastrophryne olivaceagalvanic skin responsegaleorhinus zyopterusgaius cassius longinusfriedrich anton mesmerfrederick moore vinsonform genus rhizoctiniaforeign correspondentforeground processingflindersia schottianaflat-topped white asterfirst council of nicaeafirst battle of bull runfirst baron rutherfordfinancial institutionfile transfer protocolfield press censorshipfibrous-rooted begoniafeast of the dedicationfamily titanosauridaefamily strophariaceaefamily stercorariidaefamily scyliorhinidaefamily scombresocidaefamily psilophytaceaefamily phyllostomidaefamily peripatopsidaefamily ostraciontidaefamily osteoglossidaefamily opisthocomidaefamily odontaspididaefamily melampsoraceaefamily megalosauridaefamily lophosoriaceaefamily hipposideridaefamily edaphosauridaefamily discoglossidaefamily belostomatidaefamily ambystomatidaefalse lily of the valleyeuropean quaking aspeneuropean house cricketeuproctis phaeorrhoeaeuphorbia helioscopiaeuphorbia cyparissiaseucalyptus paucifloraeucalyptus citriodoraeucalypt tereticornisestraterrestrial bodyeschrichtius robustuseschrichtius gibbosuserythronium dens-caniserythrina vespertilioerigonum fasciculatumeragrostic abyssinicaepipactis helleborineenvironmental scienceenteric-coated aspirinenglish cocker spanielendamoeba histolyticaempiricist philosophyelizabeth cady stantonelectrostatic printerelectrostatic machineelectronic transistorelectronic instrumentedward douglas white jr.edith giovanna gassioneconomic mobilisationechinochloa crusgalliechinocactus grusoniidryopteris oreopterisdryopteris marginalisdramatic mezzo-sopranodoubly transitive verbdomestic silkworm mothdolichonyx oryzivorusdoctoral dissertationdivision pteridophytadivision euglenophytadivision dicynodontiadissociative disorderdissociation constantdisassortative matingdirect supporting firediplotaxis tenuifoliadionysius i of syracusedicrostonyx hudsoniusdichloroethyl sulfidedesmanthus ilinoensisdemetrius poliorcetesdefensive attribitiondavid glasgow farragutdavid alfaro siqueirosdante gabriel rossettidaniel ortega saavedradangerous undertakingdalbergia stevensoniicystopteris bulbiferacypripedium calceoluscyperus alternifoliuscycladic civilisationcyamopsis psoraloidesctenocephalides feliscruciferous vegetablecrotalaria sagitalliscriminal conversationcrataegus biltmoreanacoumarone-indene resincosmological constantcorydalis claviculatacortinarius mutabiliscorpuscular radiationcoronary heart diseasecoral-root bittercressconvergent strabismuscontinental breakfastconstructive evictionconstruction industryconstantine i of greececonstant accelerationconservation of parityconservation of energyconservation of chargeconduction anesthesiacompensatory spendingcompact disc write-oncecommon snapping turtlecommon carline thistlecommencement exercisecolour television tubecolorimetric analysiscodariocalyx motoriusclostridium botulinumclose-quarter fightingclopidogrel bisulfateclintonia andrewsianaclinical psychologistclassical haemophiliaclandestine operationcitrophilous mealybugcistothorus platensiscistothorus palustrischrysophyllum cainitochrysophrys australischrosomal abnormalitychloroxylon swieteniachionochloa conspicuachinese black mushroomchilomeniscus cinctuscharles dillon stengelcervical root syndromecervical disc syndromecertificate of depositcentrolobium robustumcentaurium scilloidescelastrus orbiculatuscaspar friedrich wolffcarya myristiciformiscarolina spring beautycardiovascular systemcardiac resuscitationcarcharhinus obscuruscapsicum annuum longumcampanula aparinoidescalostoma cinnabarinacalochortus nuttalliicalifornia false morelcalculus of variationsbrush-tailed porcupinebrugmansia suaveolensbrassaia actinophyllaboykinia occidentalisbosnia and herzegovinablastodermic vessiclebittersweet chocolatebiscayne national parkbiochemical mechanismbinomial distributionbegonia semperflorensbartolommeo eustachiobalaenoptera borealisbadlands national parkbackground processingbaccharis halimifoliaavicennia officinalisaversive conditioningaustronesian languageaustralian turtledoveaustralian labor partyaustralian coral snakeatlantic spiny dogfishastrophyton muricatumastreus hygrometricusasplenium trichomanesasplenium platyneuronasparagus officinalesasarum shuttleworthiiartery of the penis bulbarteria intercostalisartemisia ludovicianaartemisia gnaphalodesartaxerxes ii of persiaariocarpus fissuratusardisia escallonoidesarctostaphylos alpinaarctic ground squirrelarceuthobium pusillumaposematic colorationapodictic propositionapalachicola rosemaryantonius stradivariusantitrust legislationandropogon virginicusandrew jackson downingamerican pasqueflowerambrosia psilostachyaaldrovanda vesiculosaairborne transmissionair force space commandafrican bowstring hempaffine transformationacacia auriculiformisabdominal nerve plexus
