13-Letter Words Containing: C,O,N,T,R,A,C,T

• an agent or device intended to prevent conception

• capable of preventing conception or impregnation

• of or pertaining to construction or architecture

• two propositions are contradictories if both cannot be true (or both cannot be false) at the same time

• of words or propositions so related that both cannot be true and both cannot be false

• that confounds or contradicts or confuses

• in disagreement

• unable for both to exist or be true at the same time

• an attack by a defending force against an attacking enemy force in order to regain lost ground or cut off enemy advance units etc.

• (chess) an attack that is intended to counter the opponent's advantage in another part of the board

• make a counterattack

• the act of certifying or bestowing a franchise on

• confirmation that some fact or statement is true through the use of documentary evidence

• a document attesting to the truth of certain stated facts

• validating the authenticity of something or someone

• opposing or neutralizing or mitigating an effect by contrary action

• by virtue of a contract

• (chemistry) the process of refinement or purification of a substance by distillation

• the conversion of alternating current to direct current

• the act of offering an improvement to replace a mistake; setting right

• determination of the length of a curve; finding a straight line equal in length to a given curve