Synonyms for Supervisor:

n.

ambassador, account executive, capitalist, agent, businessperson, businessman, businesswoman. cabinet minister, chancellor, chancellor of the exchequer, chief minister, assemblywoman, alderman, alderwoman, chief executive, assemblyman. administrator (noun)
dean, ambassador, mayor, leader, officer, captain, governor, commander.
caretaker (noun)
warden.
chief (noun)
overlord, ruler, ringleader, general.
conductor (noun)
master.
director (noun)
superintendent, king, ruler, commander, ringmaster, conductor, commandant, mayor, band master, ringleader, administrator, officer, lord, director, captain, master, magistrate, warden, general, overlord, queen, baron, executive, overseer, leader, governor, manager, taskmaster, dean, boss, foreman, chief.
employer (noun)
capitalist, businessperson.
master (noun)
commandant.
slave driver (noun)
taskmaster.
supervisor (noun)
director, chief, executive, administrator, executive program, boss, supervisory program, overseer, superintendent, manager.

Other synonyms:

Other relevant words:
chancellor, chief executive, executive program, cabinet minister, supervisory program, alderman.