The term "more planate" is an adjective that describes an object that is flatter or more level compared to something else. Some antonyms for this word might include "uneven," "irregular," "bumpy," "hilly," or "rough." These words all suggest a surface that is not flat or smooth but rather has ridges, indentations, or other types of irregularities. While "more planate" might be used to describe a tabletop or a road, the antonyms listed here would be better suited for describing natural terrain or other elements of the environment that are not typically flat or level.