of, pertaining to, or characteristic of controversy; polemical

a controversial book.

subject to controversy; debatable

a controversial decision.

given to controversy; disputatious.

adjective

agreeable , incontrovertible , peaceful , uncontroversial , undisputed , undoubted , unquestionable

adjective

arguable , argumentative , contended , contentious , contestable , controvertible , debateable , disputable , disputatious , disputed , doubtable , doubtful , dubious , dubitable , in dispute , litigious , moot , open to discussion , open to question , polemical , questionable , suspect , uncertain , under discussion , debatable , eristic , polemic