| helper |
| poor boy(noun, expression, idiom) |
| supplant(verb, change, cover, follow, alter) |
| wedge |
| U-boat |
| supersede(verb, change, cover, follow, alter) |
| tributary(adjective, low, subject, branch, secondary) |
| aide |
| auxiliary(noun, adjective, subject, substitute, replacement) |
| change(verb, cover, follow, alter, restore) |
| dependent(low, inferior, minor, secondary, indirect) |
| deputize(verb, exchange, switch, replace, swap) |
| exchange(trade, substitute, switch, replace, swap) |
| junior(adjective, low, inferior, minor, amenable) |
| less |
| low(adjective, inferior, minor, amenable, secondary) |
| makeshift(substitute, replacement, alternative, alternate, backup) |
| proxy(exchange, agent, replacement, replace, representative) |
| relief(reserve, substitute, replacement, alternate, stalwart) |
| second(noun, substitute) |