| par |
| parity |
| pendant(noun, like, copy, equal, tally) |
| picture(noun, form, appearance, figure, copy) |
| price(noun, amount, rate, worth, substitution) |
| proxy(supply, agent, substitute, replacement, alternate) |
| regular(adjective, calm, smooth, flat, plain) |
| relief(replacement, alternative, alternate, backup, surrogate) |
| replacement(substitute, alternative, alternate, backup, surrogate) |
| representative(supply, agent, replacement, alternative, alternate) |
| reserve(replacement, alternative, alternate, backup, surrogate) |
| similitude(noun, form, appearance, figure, copy) |
| soul mate |
| spit and image(noun, expression, adjective, idiom, like) |
| stand-in(substitute, replacement, alternative, alternate, backup) |
| standard |
| stopgap(supply, agent, replacement, alternative, alternate) |
| sub(substitute, replacement, alternative, alternate, backup) |
| succedaneum(supply, agent, replacement, alternative, alternate) |
| suchlike(pronoun, specific, aforementioned) |