[noun] [C] - a word or phrase which has the same or nearly the same meaning as another word or phrase in the same languageThe words 'small' and 'little' are synonyms.It is sometimes said that there are no true synonyms in the English language, and that all words have a slightly different meaning.Compare antonym.
SYNONYM
Meaning of SYNONYM in English
Cambridge English vocab. Кембриджский английский словарь. 2012