How many letters does the top answer for “a word of opposite meaning; a counterterm; -- used as a correlative of synonym. c. j. smith.” have?

The most common answer is antonym (7 letters).

Crossword clue: a word of opposite meaning; a counterterm; -- used as a correlative of synonym. c. j. smith.

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

antonym 7 letters web-def

a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each