(n.) One who, or that which, helps, aids, assists, or relieves; as, a lay helper in a parish.

Samaritan acolyte adjutant agent aid aide aide-de-camp aider ancilla assistant assister associate attendant auxiliary backer befriender benefactor benefactress benefiter best man coadjutant coadjutor coadjutress coadjutrix deputy employee executive officer follower good Samaritan good person help helping hand helpmate helpmeet inferior jack-at-a-pinch junior laborer lieutenant ministering angel ministrant paranymph paraprofessional patron right-hand man second secondary servant sideman striker subordinate succorer supporting actor supporting instrumentalist underling understrapper worker