| counterfeit(noun, extra, substitute, auxiliary, supernumerary) |
| heir |
| imitation(noun, extra, substitute, auxiliary, supernumerary) |
| interchange(noun, talk, argument, conversation, variation) |
| locum(noun, reserve, substitute, alternative, alternate) |
| permutation |
| pinch hitter(noun, expression, person, cover, informal) |
| reestablishment(return, improvement, restoration, reconstruction, reinstatement) |
| replenishment |
| restitution(noun, return, compensation, reestablishment, reinstatement) |
| subrogation(noun, substitution) |
| supersession(noun, substitution) |
| tit for tat(expression, idiom, change, talk, argument) |
| agent(noun, substitute, representative, alternative, assistant) |
| conversion(noun, change, talk, argument, transfer) |
| locum tenens(expression, idiom, alternative, alternate, backup) |
| reconstitution |
| recovery(noun, act, return, reconstruction, reestablishment) |
| renovation(noun, return, restoration, overhaul, recovery) |
| replace |