Cacuminal is a word used to describe the highest or most pointed part of a structure, such as a mountain or a pyramid. Some antonyms for cacuminal include flat, low, and level. These words describe something that is at ground level or has a flattened top. Other antonyms for cacuminal include base, bottom, and depth. These words describe the lowest or deepest part of a structure or object. Cacuminal is a specific term used to describe a very particular feature, and its antonyms describe a diverse range of alternatives that are all very different from what it describes.