| ensure(verb, support, check, maintain, secure) |
| assure(verb, support, maintain, secure, establish) |
| confirm(verb, support, maintain, determine, secure) |
| make certain(verb, expression, support, check, maintain) |
| certify(verb, support, maintain, secure, establish) |
| establish(verb, support, fix, determine, secure) |
| guarantee(verb, support, secure, see, confirm) |
| insure(verb, support, maintain, secure, establish) |
| settle(verb, support, fix, check, determine) |
| secure(verb, support, get, maintain, establish) |
| ascertain(verb, study, check, determine, correct) |
| determine(verb, fix, check, discover, confirm) |
| fix(verb, check, determine, discover, confirm) |
| find out(verb, expression, phrasal verb, fix, check) |
| warrant(verb, support, maintain, secure, establish) |
| affirm(verb, support, maintain, secure, back) |
| attest(verb, support, maintain, secure, settle) |
| back(verb, support, maintain, secure, sign) |
| catch on(verb, expression, phrasal verb, fix, check) |
| check(verb, support, determine, back, examine) |