| gentry |
| guaranteed(adjective, clear, sound, firm, plain) |
| historical |
| honest(adjective, clear, correct, right, flat) |
| in the bag(expression, adjective, idiom, clear, firm) |
| inappealable |
| indubitably |
| ineluctable(certain, unquestionable, undisputable) |
| inerrant(complete, certain, sure, valid, unquestionable) |
| inescapable(certain, unquestionable, undisputable) |
| inevitable(certain, unquestionable, undisputable) |
| infallible(clear, complete, certain, sure, valid) |
| insured(adjective, solid, certain, sure, confident) |
| intelligible |
| invincible(set, certain, unquestionable, indisputable, unassailable) |
| ironclad(set, certain, unquestionable, indisputable, unassailable) |
| irrebuttable(set, certain, unquestionable, indisputable, unassailable) |
| irresistible(set, certain, unquestionable, indisputable, unassailable) |
| known(clear, true, real, valid, indisputable) |
| kosher(adjective, correct, right, honest, exact) |