Main entry: unauthentic, inauthentic, spurious
Definition: intended to deceive
Usage: a spurious work of art
Main entry: bastardly, misbegot, misbegotten, spurious
Definition: born out of wedlock
Usage: the dominions of both rulers passed away to their spurious or doubtful offspring- E.A.Freeman
Main entry: specious, spurious
Definition: plausible but false
Usage: a specious claim; spurious inferences