IDIOSYNCRASY /ˌɪd.i.əʊˈsɪŋ.kɹə.si/ ► audio Scrabble 21 Words With Friends 21 Definition noun a behavioral attribute that is distinctive and peculiar to an individual. — synonyms: foible, mannerism Examples “He mastered the idiosyncrasies of English spelling and speech.” See all 470 words you can make from IDIOSYNCRASY → 12-letter words Words starting with I Words ending with Y ← Unscramble different letters