"Drier," as an adjective, typically means lacking moisture or wetness. There are various synonyms for this word, including arid, parched, desiccated, dehydrated, thirsty, and withered. These words imply that something lacks essential moisture and is thus dry. "Arid" generally refers to a dry, barren landscape, while "parched" is used to describe something that's extremely thirsty or dry. "Desiccated" is a more technical term, often used in scientific contexts, and typically refers to a substance that's been thoroughly dried out. "Dehydrated" usually refers to a living thing that lacks essential water, while "withered" usually describes something that's lost moisture and consequently appears shrunken or shriveled.