| substitution(substitute, replacement) |
| supplanter(replacement, alternative, alternate, backup, surrogate) |
| swap places(expression, change, follow, alter, restore) |
| swap places with(expression, idiom, exchange, switch, replace) |
| take out(expression, change, follow, alter, restore) |
| take over(verb, expression, change, cover, follow) |
| take over from(expression, idiom, change, follow, alter) |
| temp(reserve, substitute, replacement, alternate, stalwart) |
| utility player(noun, player) |
| vicar(replacement, alternative, alternate, backup, surrogate) |
| stand in for(expression, idiom, exchange, switch, replace) |
| standby(noun, cover, reserve, substitute, replacement) |
| succedaneum(replacement, alternative, alternate, backup, surrogate) |
| accessory(adjective, low, subject, minor, secondary) |
| adjuvant(adjective, low, subject, secondary, indirect) |
| al fresco(expression, idiom, air, exteriority) |
| analogy |
| ancillary(adjective, low, subject, minor, collateral) |
| answer for(expression, exchange, switch, replace, swap) |
| appurtenant(adjective, subject, collateral, secondary, indirect) |