Open English Wordnet
Adjectives
(s)deceitful, fallacious, fraudulentinvolving deception“deceitful advertising”, “fallacious testimony”, “smooth, shining, and deceitful as thin ice” (S.T.Coleridge), “a fraudulent scheme to escape paying taxes”
(s)ambidextrous, deceitful, double-dealing, duplicitous, Janus-faced, two-faced, double-faced, double-tonguedmarked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another“she was a deceitful scheming little thing” (Israel Zangwill), “a double-dealing double agent”, “a double-faced infernal traitor and schemer” (W.M.Thackeray)