| infallibly(adverb, absolutely, certainly, clearly, plainly) |
| intent(adjective, thoughtful, sober, serious, sincere) |
| intently(adverb, seriously, vigorously, earnestly, actively) |
| irrefutably(adverb, absolutely, certainly, clearly, plainly) |
| kosher |
| legit(adjective, honest, solid, pure, straight) |
| legitimate(adjective, honest, pure, straight, real) |
| legitimately(adverb, well, absolutely, certainly, easily) |
| mean business(expression, adjective, thoughtful, sober, serious) |
| meaningful(adjective, thoughtful, sober, serious, sincere) |
| no-fooling(adjective, determined, thoughtful, sober, serious) |
| no-nonsense(adjective, thoughtful, sober, serious, sincere) |
| no ifs ands or buts(expression, idiom, adverb, well, absolutely) |
| not humorously(expression, adverb, seriously, vigorously, earnestly) |
| noticeably |
| observably |
| obviously |
| official(adjective, honest, pure, true, straight) |
| on the level(adjective, honest) |
| original(adjective, pure, real, genuine, valid) |