| assure(verb, support, cover, maintain, secure) |
| ensure(verb, support, maintain, secure, agree) |
| guarantee(noun, verb, cover, secure, agree) |
| warrant(verb, support, cover, maintain, secure) |
| secure(verb, support, hold, cover, maintain) |
| safeguard(verb, hold, cover, maintain, oppose) |
| underwrite(verb, cover, secure, agree, back) |
| cover(verb, hold, maintain, oppose, secure) |
| certify(verb, support, maintain, secure, establish) |
| protect(verb, support, hold, cover, maintain) |
| bond(verb, protection, guarantee) |
| make sure(verb, expression, idiom, support, maintain) |
| promise(verb, support, give, maintain, secure) |
| ascertain |
| determine(verb, certainty) |
| guard(verb, hold, cover, maintain, secure) |
| see to it(verb, expression, idiom, phrasal verb) |
| check |
| cinch(verb, phrasal verb, cover, secure, establish) |
| control |