| say amen to(verb, expression, idiom, phrasal verb, sign) |
| say so(verb, expression, support, maintain, back) |
| seal |
| secure(verb, support, maintain, protect, promise) |
| sign off on(verb, expression, idiom, phrasal verb, sign) |
| sign on dotted line(verb, expression, idiom, sign, underwrite) |
| signature(verb, support, take, favor, agree) |
| sponsor(verb, support, maintain, back, declare) |
| stake(verb, support, maintain, secure, protect) |
| stand behind(verb, expression, phrasal verb, support, maintain) |
| subscribe to |
| substantiate(verb, support, maintain, back, declare) |
| superscribe(verb, sign, underwrite, subscribe, authenticate) |
| swear(verb, support, maintain, secure, protect) |
| swear up and down(verb, expression, idiom, phrasal verb, support) |
| uphold(verb, support, maintain, back, declare) |
| validate |
| verify(verb, support, maintain, back, declare) |
| vouch(verb, give) |
| vouch for(verb, expression, phrasal verb, support, maintain) |