| substitute(noun, adjective, person, cover, model) |
| alternate(noun, adjective, person, reserve, agent) |
| understudy(noun, character, reserve, star, substitute) |
| backup(noun, adjective, cover, reserve, substitute) |
| surrogate(noun, person, thing, agent, substitute) |
| double(noun, adjective, copy, match, reserve) |
| relief(noun, reserve, replacement, alternative, alternate) |
| second(noun, substitute, deputy) |
| replacement(noun, adjective, person, cover, reserve) |
| reliever |
| deputy(noun, adjective, reserve, agent, substitute) |
| fill-in(noun, adjective, person, informal, reserve) |
| proxy(noun, agent, substitute, replacement, representative) |
| delegate(noun, agent, substitute, replacement, representative) |
| representative(noun, agent, substitute, voice, replacement) |
| alternative(noun, substitute, replacement, alternate) |
| dummy(noun, model, substitute, replacement, alternate) |
| lieutenant(substitute, deputy) |
| pinch hitter(noun, expression, person, cover, informal) |
| standby(noun, adjective, reserve, substitute, replacement) |