| rough(adjective, hard, heavy, coarse, fresh) |
| rude(adjective, rough, coarse, natural, fresh) |
| soured(adjective, sharp, unpleasant, bitter, sour) |
| sourish(adjective, sharp, unpleasant, bitter, sour) |
| too early(expression, idiom) |
| unaged |
| unbaked(adjective, rough, fresh, raw, rare) |
| underdeveloped(adjective, hidden, inexperienced, concealed, young) |
| unfinished(adjective, rough, inexperienced, incomplete, young) |
| ungrown(lush, luxuriant, verdant) |
| unpolished |
| unseasonable(inexperienced, young, childish, undeveloped, unformed) |
| untrained(adjective, raw, green, naive, inexperienced) |
| verdant(lush, luxuriant) |
| vernal(adjective, tender, new, little, green) |
| vinegary(adjective, sharp, unpleasant, bitter, sour) |
| dry(adjective, sharp, unpleasant, bitter, sour) |
| acerbate |
| acescent |
| acetic(adjective, sharp, unpleasant, bitter, sour) |