Droughtier is a word that means "more drought-prone or dry." Its antonyms would be words that describe the opposite of drought, such as rainy or wet. Other antonyms for droughtier might include humid or moist, as these words indicate a high level of moisture in the environment. Similarly, lush, verdant, and green could be considered antonyms for droughtier, as they imply a thriving, abundant environment. Overall, the antonyms for droughtier are words that suggest a fertile, wet, and thriving landscape, rather than a dry and barren one.