| substitute(noun, replacement, alternative, someone, something) |
| ersatz |
| makeshift(supply, agent, replacement, alternative, alternate) |
| replacement(noun, alternative, alternate, backup, surrogate) |
| surrogate(noun, supply, agent, replacement, alternative) |
| alternative(noun, replacement, alternate, substitution) |
| changeling(supply, agent, replacement, alternative, alternate) |
| deputy(noun, replacement, alternative, alternate, backup) |
| double(replacement, alternative, alternate, backup, surrogate) |
| dummy(supply, agent, replacement, alternative, alternate) |
| understudy(noun, replacement, alternative, alternate, backup) |
| alternate(noun, supply, agent, replacement, alternative) |
| proxy(noun, supply, agent, replacement, alternative) |
| relief(noun, replacement, alternative, alternate, backup) |
| representative(noun, supply, agent, replacement, alternative) |
| vicar(noun, supply, agent, replacement, alternative) |
| backup(replacement, alternative, alternate, surrogate) |
| substitution |
| analogy |
| change |