WordNet: questionable

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

• also see contestable

• similar to alleged, so-called, supposed

• similar to apocryphal

• similar to debatable, problematic, problematical

• similar to doubtful, dubious, dubitable, in question

• similar to equivocal

• similar to fishy, funny, shady, suspect, suspicious

• similar to impugnable

• similar to self-styled, soi-disant

questionable

• (englanti) unquestionable (antonym)
• (suomi) kyseenalainen (synonyymi)