Synonyms of usurper

1 Syllable
boss, chief
2 Syllables
mogul, tyrant, tycoon, strongmen, fascist, despot, fuhrer, strongman, leader, hitler
3 Syllables
commander, dictator, adviser, oppressor, oligarch, ringleader, autocrat, dictators, magnate
4 Syllables
absolutist, slavedriver
5 Syllables
disciplinarian, authoritarian, totalitarian