Synonyms of controversial

1 Syllable
moot
2 Syllables
dubious, spiky, spikier, doubtful, suspect, mooter
3 Syllables
polemic, contended, contentious, fire-eating, litigious, disputed, arguable, unproven, doubtable, dialectic, uncertain, eristic
4 Syllables
disputatious, questionable, eristical, polemical, debateable, litigiousness, disputable, dubitable, contestable, unconfirmed
5 Syllables
unsubstantiated, controvertible, rationalistic
6 Syllables
argumentative