Compulsative(a.) Compulsatory.
Compulsatively(adv.) By compulsion.
Compulsion(n.) The act of compelling, or the state of being compelled; the act of driving or urging by force or by physical or moral constraint; subjection to force.
Compulsive(a.) Having power to compel; exercising or applying compulsion.
Compulsively(adv.) By compulsion; by force.
Words within compulsiveness