| double(replacement, alternative, alternate, backup, surrogate) |
| substitute(noun, replacement, alternative, someone, something) |
| usurper |
| alternate(supply, agent, replacement, alternative, backup) |
| alternative(replacement, alternate) |
| backup(replacement, alternative, alternate, surrogate) |
| changeling(supply, agent, replacement, alternative, alternate) |
| deputy(replacement, alternative, alternate, backup, surrogate) |
| dummy(supply, agent, replacement, alternative, alternate) |
| equivalent(supply, agent, replacement, alternative, alternate) |
| makeshift(supply, agent, replacement, alternative, alternate) |
| proxy(supply, agent, replacement, alternative, alternate) |
| relief(replacement, alternative, alternate, backup, surrogate) |
| replacement(alternative, alternate, backup, surrogate) |
| representative(supply, agent, replacement, alternative, alternate) |
| sub(replacement, alternative, alternate, backup, surrogate) |
| surrogate(supply, agent, replacement, alternative, alternate) |
| understudy(replacement, alternative, alternate, backup, surrogate) |
| vicar(supply, agent, replacement, alternative, alternate) |
| agent(supply, replacement, alternative, alternate, backup) |