a supporter (of an opinion, a political party)

supporter or follower

a person who speaks in favour of a person or idea

person supporting an idea or cause publicly

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

helper

a person who gives money to charity

donor

bookmaker

gamester

something that encourages a person, activity etc

supporter

a person who supports capitalism

person engaged in private ownership of business

a person who donates something

giver of gift

a person who starts and manages her or his own business

person who starts a business alone

a person, thing, that explains or supports, or is an example (of)

person who supports, advocates

an expert in finance

person who lends money, advises

supporter; admirer

person who believes or has great interest

gamester

gamester

a person who gives (help, a present etc)

donor

a person who gives a guarantee

insurer

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 gives encouragement, moral or financial support, to a person, cause, the arts etc

person who supports a cause

an implement used for clearing a blocked pipe by suction

gamester

a person who protects; something made or designed to give protection

guardian

a person, business etc paying for a sport event, a team, an exhibition etc in return for advertising a product or trade mark

person who helps, promotes