Controvertible

(a.) Capable of being controverted; disputable; admitting of question.

Thesaurus Entries

at issue, confutable, conjectural, contestable, controversial, controvertible, debatable, deniable, disputable, doubtable, doubtful, dubious, dubitable, iffy, in dispute, in doubt, in dubio, in question, mistakable, moot, open to doubt, open to question, problematic, questionable, refutable, speculative, suppositional, suspect, suspicious, uncertain