Synonyms of dubitable

Adjective

1. doubtful, dubious, dubitable, in question(predicate), questionable (vs. unquestionable)

usage: open to doubt or suspicion; "the candidate's doubtful past"; "he has a dubious record indeed"; "what one found uncertain the other found dubious or downright false"; "it was more than dubitable whether the friend was as influential as she thought"- Karen Horney

Definition and meaning of dubitable (Dictionary)