| early(adjective, time, intelligent, quick, unwarranted) |
| untimely(adjective, time, quick, impulsive, inappropriate) |
| precocious(adjective, time, smart, quick, early) |
| immature(adjective, careless, quick, impulsive, inexperienced) |
| hasty(adjective, careless, thoughtless, impulsive, rash) |
| soon(adjective, adverb, quick, improper, inappropriate) |
| inopportune(adjective, improper, impulsive, inappropriate, rash) |
| previous(adjective, impulsive, rash, earlier) |
| forward(adjective, adverb, early, earlier, headlong) |
| undeveloped(adjective, first, inexperienced, primary, young) |
| unripe(adjective, inexperienced, young, earlier, childish) |
| beforehand(adverb, early) |
| precipitate(verb, adjective, careless, thoughtless, impulsive) |
| green(adjective, informal, inexperienced, young, earlier) |
| too soon(expression, adjective, idiom, impulsive, rash) |
| unfledged(adjective, inexperienced, young, earlier, childish) |
| unseasonable(adjective, improper, inappropriate, inexperienced, unfortunate) |
| advanced |
| ill-considered(adjective, careless, thoughtless, impulsive, rash) |
| ill-timed |