The antonyms for the word "lowest parts" are "highest points," "peaks," "summits," "tops," and "pinnacles." These words indicate the opposite of "lowest parts" and refer to the highest points of an object or a surface. For instance, the highest point of a mountain is its summit, and the topmost part of a tree is its canopy. The antonyms for "lowest parts" are relevant in various contexts, such as geography, architecture, botany, and even human emotions. In short, for every bottom, there is a top, and for every low, there is a high.