| authenticated(adjective, honest, certain, true, straight) |
| authoritative(adjective, pure, original, real, genuine) |
| beyond shadow of doubt(expression, idiom, adverb, absolutely, certainly) |
| card-carrying(adjective, solid, material, real, genuine) |
| categorically(adverb, well, absolutely, really, certainly) |
| certain(adjective, honest, pure, substantial, straight) |
| certainly |
| clearly |
| close(adjective, thoughtful, sober, serious, sincere) |
| come what may(expression, idiom, adverb, absolutely, certainly) |
| concrete(adjective, solid, material, certain, substantial) |
| constant(adjective, thoughtful, sober, serious, sincere) |
| cool it(expression, adverb, seriously, vigorously, earnestly) |
| credible(adjective, pure, original, real, genuine) |
| cut the comedy(expression, idiom, adverb, seriously, vigorously) |
| de facto |
| demonstrably |
| determined(adjective, thoughtful, sober, serious, sincere) |
| determinedly(adverb, seriously, vigorously, earnestly, actively) |
| earnest(adjective, important, determined, sober, serious) |