antonymous

Definitions of antonymous
1

adj of words: having opposite meanings

Synonyms:
complementary
of words or propositions so related that each is the negation of the other
contradictory
of words or propositions so related that both cannot be true and both cannot be false
contrary
of words or propositions so related that both cannot be true but both may be false
contrastive, incompatible
of words so related that one contrasts with the other
converse
of words so related that one reverses the relation denoted by the other
Antonyms:
synonymous
(of words) meaning the same or nearly the same
similar
(of words) expressing closely related meanings
substitutable
(of words) interchangeable in a given context without changing the import of the expression
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