Synonyms of high-and-mighty

1 Syllable
vain, proud
2 Syllables
bossy, snobbish, stuffy, cocky, regnant, haughty, high-hat, snotty, sniffy, stuck-up
3 Syllables
disdainful, insolent, officious, vainglorious, wiseguy, ascendant, prideful, cavalier, imperial, toplofty, up-stage, superior, high-handed, imperious, paramount, big-headed, sovereign, dogmatic, uppity, prevalent, despotic
4 Syllables
egotistic, autocratic, predominant, tyrannical, oppressive, self-respecting, overbearing, supercilious, dictatorial, magisterial, overweening, peremptory, preponderant, dismissive
5 Syllables
imperative