What is another word for "substitute"?

Roget's Thesaurus (1911) lists these synonyms for "substitute": abalienate, abalienation, ablegate, accredit, acquire, acting, alien, alienable, alienate, alienation, alter, and, another, answer, appear, archon, assign, assignment, bargain, barter, behalf, brief, champion, chancellor, change, come, coming, commissioner, confer, consign, consul, convey, conveyance, conveyancing, delegate, demise, deputy, devolution, devolve, director.