结盟jié méngto form an alliance; to ally oneself with; allied with; aligned; to bond with
盟约méng yuēcontract of alliance; oath or treaty between allies
加盟jiā méng(of a nation) to join an alliance; (of an athlete) to join a sports team; (of an entrepreneur) to join a franchise; (of an actor) to join the cast of a movie; (of a recording artist) to sign with a label