Synonyms and related words :
abstract, academic, arguable, armchair, at issue, confutable, contestable, controversial, controvertible, debatable, deniable, disputable, doubtable, doubtful, dubious, dubitable, hypothetic, hypothetical, ideal, iffy, impractical, in dispute, in doubt, in dubio, in question, mistakable, moot, notional, open to doubt, open to question, postulatory, problematic, putative, questionable, refutable, reputed, speculative, suppositional, supposititious, suppositive, suppository, suspect, suspicious, theoretical,