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Related to antonymous: synonymous
A word having a meaning opposite to that of another word: The word "wet" is an antonym of the word "dry."
an·ton′y·mous (ăn-tŏn′ə-məs) adj.
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|Adj.||1.||antonymous - of words: having opposite meanings|
synonymous - (of words) meaning the same or nearly the same