| self-confident(adjective, strong, firm, certain, definite) |
| sound(adjective, calm, clear, strong, secure) |
| unambiguous(adjective, clear, sound, firm, plain) |
| undisputable(adjective, certain, true, ideal, all time) |
| assertive(adjective, firm, energetic, certain, positive) |
| bound(adjective, set, strong, tough, flat) |
| clear-cut(adjective, clear, plain, solid, certain) |
| conclusive(adjective, clear, strong, certain, definite) |
| indeed(adverb, just, assent, really, exactly) |
| inescapable(adjective, certain, obvious, necessary, inexorable) |
| real(adjective, clear, sound, correct, firm) |
| staunch(adjective, calm, good, close, strong) |
| unchallengeable(adjective, ideal, all time, the best) |
| unchangeable(adjective, calm, strong, secure, flat) |
| uncontested(adjective, ideal, all time, the best) |
| assuredly(adverb, assent) |
| cogent(adjective, ideal, all time, the best) |
| enduring(adjective, calm, close, quality, strong) |
| for certain(expression, adjective, idiom, adverb, certain) |
| for sure(expression, idiom, adverb, certain, definite) |