Synonyms for fallacious

Adjective

1. fallacious, unsound, invalid (vs. valid)

usage: containing or based on a fallacy; "fallacious reasoning"; "an unsound argument"

2. deceitful, fallacious, fraudulent, dishonest (vs. honest), dishonorable

usage: intended to deceive; "deceitful advertising"; "fallacious testimony"; "smooth, shining, and deceitful as thin ice" - S.T.Coleridge; "a fraudulent scheme to escape paying taxes"

3. fallacious, incorrect (vs. correct), wrong (vs. right)

usage: based on an incorrect or misleading notion or information; "fallacious hope"