friend

(noun) a person you know well and regard with affection and trust. Example: "He was my best friend at the university."

(noun) an associate who provides cooperation or assistance. Synonyms: ally. Example: "He's a good ally in fight."

(noun) a person with whom you are acquainted. Synonyms: acquaintance. Examples: "I have trouble remembering the names of all my acquaintances." "We are friends of the family."

(noun) a person who backs a politician or a team etc.. Synonyms: supporter, protagonist, champion, admirer, booster. Examples: "All their supporters came out for the game." "They are friends of the library."

(noun) a member of the Religious Society of Friends founded by George Fox (the Friends have never called themselves Quakers). Synonyms: Friend, Quaker.