| ghost writer(expression, replacement, alternative, alternate, backup) |
| locum(replacement, alternative, alternate, backup, surrogate) |
| locum tenens(expression, replacement, alternative, alternate, backup) |
| makeshift(replacement, alternative, alternate, backup, surrogate) |
| procurator(replacement, alternative, alternate, backup, surrogate) |
| proxy(replacement, alternative, alternate, backup, surrogate) |
| recourse(replacement, alternative, alternate, backup, surrogate) |
| refuge(replacement, alternative, alternate, backup, surrogate) |
| relay(replacement, alternative, alternate, backup, surrogate) |
| relief(reserve, substitute, replacement, alternate, stalwart) |
| replacement(reserve, substitute, alternative, alternate, stalwart) |
| representative(replacement, alternative, alternate, backup, surrogate) |
| reserve(noun, substitute, replacement, alternative, alternate) |
| resort(replacement, alternative, alternate, backup, surrogate) |
| resource(reserve, replacement, alternative, alternate, backup) |
| standby(noun, reserve, substitute, replacement, alternative) |
| stopgap(replacement, alternative, alternate, backup, surrogate) |
| succedaneum(replacement, alternative, alternate, backup, surrogate) |
| supplanter(replacement, alternative, alternate, backup, surrogate) |
| supply(replacement, alternative, alternate, backup, surrogate) |