Synonyms and related words :
arguable, argumental, argumentative, at issue, belligerent, cat-and-dog, cat-and-doggish, combative, confutable, conjectural, contentious, contestable, controvertible, debatable, deniable, dialectic, disputable, disputatious, doubtable, doubtful, dubious, dubitable, eristic, factious, iffy, ill-humored, in dispute, in doubt, in dubio, in question, litigious, logomachic, mistakable, moot, open to doubt, open to question, pilpulistic, polemic, polemical, pro and con, problematic, provocative, quarrelsome, questionable, refutable, scrappy, speculative, suppositional, suspect, suspicious, unsettled