| equivalent(supply, agent, replacement, alternative, alternate) |
| fill-in(replacement, alternative, alternate, backup, surrogate) |
| ghost writer(expression, supply, agent, replacement, alternate) |
| locum(supply, agent, replacement, alternative, alternate) |
| locum tenens(expression, supply, agent, replacement, backup) |
| pinch-hitter(replacement, alternative, alternate, backup, surrogate) |
| procurator(supply, agent, replacement, alternative, alternate) |
| proxy(supply, agent, replacement, alternative, alternate) |
| relay(supply, agent, replacement, alternative, alternate) |
| relief(replacement, alternative, alternate, backup, surrogate) |
| replacement(alternative, alternate, backup, surrogate) |
| representative(supply, agent, replacement, alternative, alternate) |
| reserve(replacement, alternative, alternate, backup, surrogate) |
| shift |
| stand-in(replacement, alternative, alternate, backup, surrogate) |
| standby(supply, agent, replacement, alternative, alternate) |
| string |
| sub(replacement, alternative, alternate, backup, surrogate) |
| succedaneum(supply, agent, replacement, alternative, alternate) |
| successor(replacement, alternative, alternate, backup, surrogate) |