Arbitrary and Compulsory

Arbitrary adjective - Having or showing a tendency to force one's will on others without any regard to fairness or necessity.

Compulsory is an antonym for arbitrary in forcible topic.

Nearby Words: arbitration, arbitrarily, arbitrariness, arbitral

Compulsory adjective - Forcing one's compliance or participation by or as if by law.

Arbitrary is an antonym for compulsory in optional topic.

Nearby Words: compulsion, compulsive