| substitute(verb, exchange, switch, swap, interchange) |
| back up(verb, expression, phrasal verb, support, cover) |
| double for(verb, expression, exchange, switch, replace) |
| relieve(verb, exchange, switch, replace, swap) |
| replace(verb, exchange, switch, swap, interchange) |
| act for(verb, expression, phrasal verb, support, cover) |
| advocate(verb, support, maintain, favor, back) |
| aid(verb, support, maintain, favor, back) |
| alternate(verb, cover, relieve, exchange, substitute) |
| answer for(verb, expression, phrasal verb, support, cover) |
| apologize for(verb, expression, phrasal verb, support, maintain) |
| argue(verb, support, maintain, favor, back) |
| assert(verb, support, maintain, favor, back) |
| back(verb, support, maintain, favor, approve) |
| be in place of(verb, cover, relieve, exchange, substitute) |
| bear one out(verb, expression, idiom, phrasal verb, support) |
| befriend(verb, support, maintain, favor, back) |
| champion(verb, support, maintain, favor, back) |
| change(verb, exchange, switch, replace, swap) |
| come to defense of(verb, expression, idiom, phrasal verb, support) |