| act for(expression, exchange, switch, swap) |
| alternate(exchange, switch, swap) |
| answer for(expression, exchange, switch, swap) |
| back up(expression, exchange, switch, swap) |
| be in place of(exchange, switch, swap) |
| change(exchange, switch, swap) |
| commute(exchange, switch, swap) |
| cover for(expression, exchange, switch, swap) |
| deputize(exchange, switch, swap) |
| displace(exchange, switch, swap) |
| do the work of(expression, idiom, exchange, switch, swap) |
| double for(expression, exchange, switch, swap) |
| exchange(switch, swap) |
| fill in for(expression, idiom, exchange, switch, swap) |
| go as(expression, exchange, switch, swap) |
| interchange(exchange, switch, swap) |
| proxy(exchange, switch, swap) |
| relieve(exchange, switch, swap) |
| replace(exchange, switch, swap) |
| spell(exchange, switch, swap) |