Aider, Alternate, Alternative, Ambassador, Analogy, Appointee, Assistant, Attendant, Attorney, Auxiliary, Backup, Bailiff, Barrister, Beadle, Beagle, Candidate, Captain, Change, Changeling, Commissioner, Comparison, Conductor, Connection, Constable, Copy, Counsel, Counterfeit, Delegate, Detective, Director, Double, Dummy, Emissary, Envoy, Equal, Equivalent, Ersatz, Exchange, Factor, Fake, Fed, Federal, Front, Ghost, Governor, Help, Helper, Helpmate, Imitation, Impresario, Inspector, Intermediary, Intermediate, Interventionist, Lawyer, Legate, Licensee, Lieutenant, Makeshift, Manager, Marshal, Acolyte, Adjutant, Administrator, Advocate, Agent, Aid, Aide, Mediator, Medium, Metaphor, Metonymy, Middleman, Minister, Mouthpiece, Negotiator, Nominee, Officer, Ombudsman, Operative, Personnel, Phony, Policeman, Policewoman, Proctor, Producer, Proxy, Rector, Relief, Replacement, Representative, Reserve, Reserves, Ringer, Second, Secondary, Selectee, Sergeant, Servant, Sheriff, Sign, Solicitor, Spares, Spokesman, Spokesperson, Spokeswoman, Sub, Substitute, Substitution, Superintendent, Surrogate, Symbol, Token, Trooper, Understudy, Vicar