FALLACIOUS /fə.ˈleɪ.ʃəs/ Scrabble 15 Words With Friends 19 Definition adjective containing or based on a fallacy. — synonyms: unsound adjective intended to deceive. — synonyms: deceitful, fraudulent adjective based on an incorrect or misleading notion or information. See all 189 words you can make from FALLACIOUS → 10-letter words Words starting with F Words ending with S ← Unscramble different letters