Synonyms to disprovable

refutable, arguable, at issue, confutable, conjectural, contestable, controversial, controvertible, debatable, defeasible, 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, speculative, suppositional, suspect, suspicious