leader - a person who rules or guides or inspires others

administrator, executive - someone who manages a government agency or department

administrator, decision maker - someone who administers a business

capo - the head of a branch of an organized crime syndicate

department head - the head of a department

don, father - the head of an organized crime family

superior general, general - the head of a religious order or congregation

general manager - the highest ranking manager

grand dragon - a high ranking person in the Ku Klux Klan

head of household - the head of a household or family or tribe

secretary - a person who is head of an administrative department of government