Synonyms of questionable

Adjective

1. questionable (vs. unquestionable), alleged(prenominal), so-called, supposed, apocryphal, debatable, problematic, problematical, doubtful, dubious, dubitable, in question(predicate), equivocal, fishy, funny, shady, suspect, suspicious, impugnable, self-styled, soi-disant, contestable

usage: subject to question; "questionable motives"; "a questionable reputation"; "a fire of questionable origin"

2. questionable, refutable, confutable, confutative, deniable (vs. undeniable)

usage: able to be refuted

Definition and meaning of questionable (Dictionary)