| insistent(adjective, affirmative) |
| never-failing(adjective, strong, complete, flat, firm) |
| no doubt(expression, idiom, certainty, assent) |
| optimistic(adjective, hopeful) |
| palpable(adjective, plain, definite, obvious, distinctive) |
| precisely(adverb, assent) |
| probable(adjective, reasonable, sensible, natural, normal) |
| proven(adjective, test, expert, reliable) |
| purposeful |
| responsible(adjective, good, strong, solid, true) |
| sanguine(calm, strong, certain, definite, wise) |
| self-possessed(adjective, calm, quiet, cool, firm) |
| straight(adjective, close, correct, flat, firm) |
| telling(adjective, energetic, certain, definite, decisive) |
| truly(certainty, assent, affirmation) |
| trusting(adjective, certain, self-assured, assured, self-confident) |
| unafraid(adjective, certain, bold, wise, brave) |
| undeviating(adjective, strong, flat, firm, solid) |
| undoubting(adjective, set, clear, firm, certain) |
| unquestioned |