Reverse Dictionary: CONTRADICT

ADJECTIVES
1475 ► contradictory; saying the opposite → AGAIN-SAYING → obs.
1489 ► given to contradiction; stubbornly or wilfully disobedient to authority → GAINSAYING 
1608 ► contradictory → CONTRADICTORIOUS → obs.
1676 ► contradictory; inclined to oppose → OPPOSIVE → obs. rare
1844 ► of information, news, etc.: false, misleading; confused and contradictory → MUNG → US obs.
1877 ► contradictory; argumentative, contentious, quarrelsome → THREAPING → Eng. dial.
1889 ► arguing, contradictory → BACK-SPOKEN → Sc.
1897 ► contradictory, intractable, contumacious → ILL-CONTRIVED → Sc.
1897 ► contradictory; peevish, ill-tempered, quarrelsome → THRAWN-GABBIT → Sc.
1905 ► contradictious and quarrelsome → QUAARTISH → Eng. dial. (Bk.)
1905 ► given to contradiction, faultfinding, litigious → QUARRELSOME → Sc. (Bk.)
1964 ► conflicting, or contradictory → PUSHMI-PULLYU
2002 ► containing an inherent contradiction → IRISH → Aust. sl. (Bk.)

NOUNS
1300 ► contradiction → GAIN-SAW → obs.
1350 ► contradiction, opposition, contention → AGAIN-SAYING → obs.
1400 ► contradiction → AGAIN-SAW → obs.
1450 ► contradiction, opposition, contention → AGAINST-SAYING → obs.
1535 ► contradiction; denial → NAY-SAYING 
1601 ► contradiction → GAINSAY 
1620 ► contradiction or opposition in speech or writing → OBLOQUITY → obs. rare
1638 ► contradiction of terms; entanglement, confusion → IMPLICANCY → obs. rare
1656 ► contradiction; a speaking against → ANTILOQUY → obs.
1895 ► contradiction; a reprimand; a scolding → CALLDOWN → Amer. sl.
1898 ► contradiction, perverse argument → CAM → Eng. dial. (Bk.)
1905 ► contradiction → NAY-SAY → Eng. dial. (Bk.)

NOUNS, PERSON
1449 ► a person who contradicts or speaks against someone or something; an opponent, a gainsayer → AGAIN-SAYER → obs.
1603 ► a contradictor; a detractor, a slanderer → OBLOCUTOR → obs.
1972 ► a person who behaves in a conflicting or contradictory manner → PUSHMI-PULLYU

VERBS
1325 ► to express contradiction or dissent → NAY → obs.
1340 ► to contradict; to speak against → GAINSAY 
1382 ► to contradict; to speak against, to dispute → AGAIN-SAY → rare
1537 ► to contradict; to renounce, to repudiate → ABRENOUNCE → obs.
1618 ► to contradict; to renounce; to repudiate → ABRENUNCIATE → obs. rare
1624 ► to contradict; to deny → NEGE → obs. rare
1656 ► to speak or act in contradiction → THWARTLE → obs. exc. Eng. dial.
1746 ► to contradict rudely → BANNEE → Eng. dial.
1762 ► to contradict a person; to claim to the contrary that something else is the case; to dispute a remark → DOWNFACE → orig. & chiefly Irish
1773 ► to contradict; to refuse, to deny → NAY-SAY → Eng. dial. & arch.
1790 ► to contradict; to dispute, to argue; to thwart, to oppose; to provoke, to anger → THROW → Sc. & Eng. dial.
1809 ► to contradict → OMPERLODGE → Eng. dial. obs.
1812 ► to contradict; to deny → NEGATIVE 
M19 ► to contradict an earlier statement; to change one’s mind → TALK OUT OF THE OTHER SIDE OF ONE’S MOUTH → sl.
1875 ► to contradict; to oppose vexatiously; to quarrel → CAM → Eng. dial.
1888 ► to contradict → SAY EECHIE TO SOMEONE’S OCHIE → Sc.
1898 ► to contradict → CALL AGAIN → Sc. (Bk.)
1905 ► to contradict → COUNTERDICT → Amer. dial.
1905 ► to contradict → THREAP → Eng. dial. (Bk.)
1905 ► to contradict, to bicker, to dispute → UMPERLODGE → Eng. dial. (Bk.)
1963 ► to interrupt a speaker or contradict him before he has finished → CROSS-TALK → Amer. dial.