The term "maximum height" refers to the highest point or limit that something can reach. There are a number of synonyms that can be used to describe this concept, including peak height, summit elevation, zenith altitude, topmost elevation, and highest point. Other phrases that can be used in place of "maximum height" include upper limit, highest attainable point, highest possible point, and vertical apex. Whether you are discussing the height of a building, mountain, or airplane, there are a range of terms that can be employed to convey the idea of the highest point or limit that can be reached.