Synonyms: plausible
Definition: apparently reasonable and valid, and truthful
Usage: a plausible excuse
Similar words: arguable
Definition: capable of being supported by argument
Similar words: slick, glib, pat
Definition: having only superficial plausibility
Usage: glib promises; a slick commercial
Synonyms: plausible
Definition: given to or characterized by presenting specious arguments
Usage: a plausible liar
Similar words: insincere
Definition: lacking sincerity
Usage: a charming but thoroughly insincere woman; their praise was extravagant and insincere