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18-Letter Words Containing: O,I,R,I,S,T

 (In Any Order)
There are 189 18 letter words, 385 18 letter phrases and 0 18 letter abbr's with O,I,R,I,S,T in.

Best Scoring 18 Letter Words With: O,I,R,I,S,T

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All 18 Letter Words

Words (189)
disproportionatelytransubstantiationtransmogrificationoversimplificationverisimilitudinousuniformitarianismsultrasophisticatedultramicroscopicaltriskaidekaphobiastriboluminescencestriboelectricitiestransportabilitiestransistorizationstransilluminationsthrombophlebitidesthermoplasticitiestheatricalizationssupranationalitiessupersophisticatedsuperminicomputerssupercivilizationssuperadministratorsubcategorizationsstructuralizationsstoichiometricallystereospecificallystereoregularitiessemiconservativelysatisfactorinessesribonucleoproteinsrevascularizationsrenationalizationsreinstitutionalizerehospitalizationsredistributionistsrecrystallizationsreconstructionistsreconstructionismsradiosensitivitiesquattuordecillionsquasiperiodicitiesprovincializationspropagandisticallypronounceabilitiespraiseworthinessespostmillenarianismpolyesterificationpolyacrylonitrilespiezoelectricitiesphotoreactivationsphotomicrographiesphotolithographiesphotodisintegratesphotodisintegratedpertinaciousnessesparticularizationsoverspecializationoveroptimisticallyoverindustrializesoverindustrializedoverfertilizationsovercommunicationsoverclassificationorthopsychiatristsorthogonalizationsnonrevolutionariesnoninterventionistnonfraternizationsnondiscriminationsnoncooperationistsnoncomparabilitiesnonarbitrarinessesneurotransmissionsneuropsychiatristsneurophysiologistsmultifariousnessesmonochromaticitiesmisrepresentationsmisinterpretationsmisadministrationsmineralocorticoidsmicroreproductionsmicrophotographiesmicrometeorologistmicrometeorologiesmicromanipulationsmicrolepidopterousmicroencapsulationmicroencapsulatingmicrodensitometricmicrodensitometersmicrocrystallinitymicrocalorimetriesmeretriciousnessesmelodramatizationsmechanochemistriesmaladministrationsmagnetostrictivelylepidopterologistsirresponsibilitiesintrospectionisticinterrelationshipsinteroperabilitiesinternationalitiesinternationalisinginterinstitutionalintercolumniationsindustrializationsincorruptibilitiesinconvertibilitiesincommensurabilityimpersonalizationsimmunoreactivitiesimmunoprecipitateshypersensitizationhyperrationalitieshyperpolarizationshyperpigmentationshypernationalistichyperimmunizationshyperalimentationshydroelectricitiesgranulocytopoiesisfractionalizationsferroelectricitiesexterritorialitiesevapotranspirationelectrophysiologicelectrophilicitieselectrodesiccationelectrodepositionselectrochemistriesdisproportionationdisproportionatingdisintermediationsdihydroergotaminesdiastereoisomerismdepersonalizationsdematerializationsdedifferentiationsdecriminalizationsdeconstructionistscreditworthinessescounterquestioningcounterinstitutioncounteradvertisingconversationalistscontradistinctionscongregationalistscongregationalismscompartmentalisingcommercializationscommensurabilitiesbureaucratizationsbourgeoisificationbloodthirstinessesbiotransformationsbiodegradabilitiesbacteriorhodopsinsaustralopithecinesantidiscriminationanticommercialismsantiadministrationanagrammatizationsunsatisfactorinessultranationalistictriphosphopyridineterritorialisationrhinolaryngologistpteridospermopsidaovercapitalisationnonprognosticativemuscivora-forficatalaryngopharyngitislacto-vegetarianisminternationalistichypoparathyroidismglomerulonephritisfibrocartilaginousdiethylstilbestrolcytoarchitectonicscross-fertilizationcross-fertilisationcorrosion-resistantballistocardiogramarteriolosclerosisantiferromagnetismanticholinesteraseanti-traditionalism
Phrases (385)
woodwind instrumentwisteria floribundavictor frankensteinupton beall sinclairthird epistle of johnthird epistel of johntelevision reportertelevision receiversyzygium aromaticumsyrian monetary unitsupervisory routinesuperiority complexsocial organizationsocial organisationsir mortimer wheelersir martin frobishersir frederick ashtonsir christopher wrenshort-term liabilitysetophaga ruticillascottish highlanderscorpio the scorpionrespiratory illnesspriority processingposterior pituitarypositive reinforcerpolish monetary unitpiano transcriptionphysical attractionostrya carpinifoliaoscar hammerstein iiorder ichthyosauriaoil-industry analystnational censorshipnarcotic antagonistminor tranquilliserminister of religionmaterial possessionlouis-hector berliozlinguistic relationjames whitcomb rileyinternational scaleinstallation chargehypostasis of christhypertonic solutionhistorical documentheat of vaporisationgovernment ministergiambattista marinogenus struthiomimusgarcinia mangostanafunctional disorderfricative consonantfirst epistle of johnfederation of tribesdmitri shostakovichdivision eubacteriadistributor housingdirect transmissiondiplomatic ministerdanish monetary unitdame sybil thorndikecyanocitta cristatacrotalus mitchelliiconstantin brancusicommissaire maigretcolumbia universitychemical operationscapital of australiabush administrationbook of instructionsblue ridge mountainsbanana passion fruitauthoritarian stateattestation serviceartistic productionartemisia filifoliaarmoracia rusticanaantineoplastic drugandrew dickson whiteanamnestic reactionamphibious aircraftair-to-ground missileadministrative bodywinter olympic gameswhite slime mushroomwhite fringed orchisvolumetric analysisvinegar joe stilwellvespertilio murinusvena supraorbitalisuniversity of sussexuniversity of oxfordtrusteeship counciltropical rain foresttrogium pulsatoriumtrisodium phosphatetremella fuciformistransmission systemtransitive verb formtransfiguration daytransfer of trainingtobacco mosaic virusthermosetting resinthermoplastic resinthermobia domesticathermionic emissiontheory of indicatorsthamnophis sirtalisthamnophis sauritusthamnophis proximusthalamostriate veinteucrium scorodoniaterritorial reservetaraktogenos kurziitaraktagenos kurziisystema digestoriumsymplocus tinctoriaswiss confederationsurjective functionsuborder tarsioideasuborder ruminantiasuborder lacertiliastriped button quailstress incontinencestraight-line methodstochastic variablestereoscopic visionstellar associationstarvation acidosisstanford universityst. christopher-nevissporobolus poiretiispirit of turpentinesouthern maidenhairsolar magnetic fieldsodium hypochloritesociological theorysmilax rotundifoliaslip friction clutchsir ernst boris chainsir alfred hitchcocksignal-to-noise ratioside-blotched lizardshortia galacifoliasexual relationshipserratula tinctoriasensory deprivationsensorimotor regionseminiferous tubulesemiconductor diodesecondary dentitionsecobarbital sodiumsao tome and principesample distributionsaint teresa of avilasacrifice operationrhodanthe manglesiirhizopus stoloniferrhizomatous begoniarhizoctinia diseaserhetorical questionrespiratory diseaserepulsorlift enginereligious mysticismrelative atomic massregression equationregistration numberregional anesthesiareal-time processingreactive depressionreaction propulsionratibida columnarisquadriphonic systempyrrhuloxia sinuatapylodictus olivarispus-forming bacteriapublic relations manpublic presentationpterocarpus indicuspsychotria capensispsoriatic arthritisprunus angustifoliaprospero lambertiniprosecuting officerpropositional logicprofessional tennisprionotus carolinusprehistoric cultureprairie golden asterpotentilla anserinapotassium hydroxideponcirus trifoliatapolystichum brauniipolitical commissarplatanus orientalisplatanus acerifoliaphragmites communispezophaps solitariapersonal credit lineperiodontal diseasepenstemon rydbergiipedestrian crossingparathion poisoningpaprilus alepidotuspancreatic fibrosispalestine authorityoxytropis lambertiiornithopod dinosaurorder ustilaginalesorder rickettsialesorder polymastiginaobservation stationnormative economicsnormal distributionnon-christian priestneurotic depressionnasogastric feedingmyosotis scorpiodesmyositis trichinosamultiple regressionmolecular biologistminor diatonic scalemineral associationminato ohashi bridgemilitary commissionmilitary censorshipmicroscopic anatomymetaphosphoric acidmerovingian dynastymarta brigit nilssonmalacosoma disstriamajor tranquillisermajor diatonic scalemachine translationlivistona australislitocranius wallerilip synchronizationlip synchronisationlimnocryptes minimaligustrum japonicumlearner's dictionaryleaning tower of pisalathyrus latifoliuslate-spring-bloominglactarius deliciosokingdom protoctistakeratosis nigricanskammon strait bridgejunction transistorjudicial separationjessica lucy mitfordjean francois milletisopyrum biternatumiron-storage diseaseintravenous feedinginternal combustionintermediate shroudinterfacial tensioninsider informationinorganic phosphateinorganic chemistryinformation scienceinformation measureinflationary spiralinductive reasoningindirect expressionin your birthday suitin one's birthday suitidiopathic disorderhysterical neurosisholocentrus bullisihesperis matronalishalicoeres radiatushaematobia irritansgraduation exercisegradable oppositionglorious revolutiongeostationary orbitgenus trichodesmiumgenus rhinonicterisgenus dicranopterisgenus chorizagrotisgenus centropristisgenus actiniopterisgenital personalitygastroepiploic veinfuchsia excorticatafringed loosestrifefrancois mitterrandfavourable positionfamily stromateidaefamily rhiptoglossafamily relationshipfamily orchestiidaefamily ceratopsidaeeuclid's fourth axiomeptesicus serotinusepacris obtusifoliaenglish hippocrateselectrostatic fieldecclesiastical robeeastern indigo snakeeastern catholicismeast indian rosewooddryopteris goldianadryopteris filix-masdryopteris dilatatadoctor of humanitiesdivision rhodophytadivine right of kingsdiversionary attackdistrict of columbiadissociation energydiscretionary trustdeflationary spiraldeep supporting firedeductive reasoningcytisus multifloruscross-country skiingcross-country ridingcrisis interventioncrataegus apiifoliacorticospinal tractcorrosive sublimatecoreopsis tinctoriacordyline australiscoptis groenlandicaconversion reactionconversion hysteriacontinuing trespasscontagious abortioncongenital disorderconflict of interestcomputer simulationcomplex prepositioncompetitor analysiscollective securityclematis versicolorcitrus aurantifoliacitroncirus webbericirsium lanceolatumchristian schonbeinchoriotis australischolesterosis cutischarles william postcercis occidentalisceratotherium simumcatherine i of russiacarolingian dynastycapital of singaporecapital of san marinocapital of costa ricacalostoma raveneliibrush-tail porcupinebroadcasting studiobritish labour partybrevoortia tyrannisborn-again christianbird-footed dinosaurbinge-vomit syndromebidens trichospermaautomobile industryautoimmune disorderasterid dicot familyassociate in nursingasian tiger mosquitoarteria ethmoidalisarteria communicansartemisia abrotanumaristotelia serrataaristolochia duriorarisaema dracontiumapothecaries' weightangoumois grain mothanarchist communismalsophila pometariaalan mathison turingagitated depressionaegilops triuncalisadmiralty mountainsacute brain disorderacoustic resistanceacoustic projectionacoustic absorption
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