a person, state etc giving help or support to another

something united with another, especially by treaty

a person who helps another (especially as a deputy or as a junior worker)

helper

a person joint with others in work, business or crime

colleague

a person working with another or others

associate, fellow worker

a person who conspires

schemer

a person who has a share in the profits of a business etc in addition to her or his salary or wages

associate

a person who helps

assistant

a faithful supporter, especially one who obeys without question the orders of a leader

follower

an army officer below a captain; junior officer in the Navy

assistant

a person who takes a part with another or others in some activity

person who takes part with another

a person who cooperates with the enemy

traitor