| foolproof(adjective, dependable, infallible) |
| certain(adjective, certain, definite, sure, expected) |
| infallible(adjective, certain, flawless, dependable, unquestionable) |
| sure(adjective, certain, definite, expected, assured) |
| unfailing(adjective, certain, flawless, unquestionable, undisputable) |
| good(adjective, dependable) |
| reliable(adjective, dependable) |
| guaranteed(adjective, certain, definite, sure, flawless) |
| secure(adjective, certain) |
| unerring(adjective, certain, flawless, unquestionable, undisputable) |
| accurate(certain, unquestionable, undisputable) |
| assured(certain, definite, sure, unquestionable, approved) |
| dependable |
| effective |
| excellent(adjective, dependable) |
| for a fact(certain, definite, sure, unquestionable, assured) |
| abiding(certain, unquestionable, undisputable) |
| anticipated(expected, foreseeable) |
| bound(certain, unquestionable, undisputable) |
| bound to be(expression, idiom, certain, unquestionable, undisputable) |