| ghost(noun, supply, reserve, agent, alternative) |
| auxiliary(supply, agent, replacement, alternative, alternate) |
| backup(replacement, alternative, alternate, surrogate) |
| deputy(replacement, alternative, alternate, backup, surrogate) |
| dummy(supply, agent, replacement, alternative, alternate) |
| sub(replacement, alternative, alternate, backup, surrogate) |
| surrogate(noun, supply, agent, replacement, alternative) |
| agent(supply, replacement, alternative, alternate, backup) |
| alternate(supply, agent, replacement, alternative, backup) |
| assistant(replacement, alternative, alternate, backup, surrogate) |
| author |
| changeling(supply, agent, replacement, alternative, alternate) |
| coauthor |
| delegate(supply, agent, replacement, alternative, alternate) |
| dernier ressort(expression, supply, agent, replacement, alternate) |
| double(replacement, alternative, alternate, backup, surrogate) |
| equivalent(supply, agent, replacement, alternative, alternate) |
| ersatz |
| expediency(supply, agent, replacement, alternative, alternate) |
| expedient(supply, agent, replacement, alternative, alternate) |