Synonyms for Cavalier (same or very similar meaning)
WordNet sense 1 (a gallant or courtly gentleman):
chevalierWordNet sense 2 (a royalist supporter of Charles I during the English Civil War):
royalistWordNet sense 3 (given to haughty disregard of others):
high-handedWordNet sense 4 (tending to domineer):
domineeringFrom the ODE community, based on WordNetadd/edit