The word "hippopotamuses" is a plural noun that refers to large, herbivorous mammals that are native to Africa. There are several synonyms for this word that can be used interchangeably depending on the context. Some of the alternative terms for hippopotamuses include "river horses," "water pigs," and "hippos," which is a shortened version of the original word. Other synonyms include "hungry hungry hippos," which is a reference to a popular children's game, as well as "thick-skinned behemoths" and "submerged giants." Regardless of which synonym is used, it is important to note that hippopotamuses are fascinating creatures that play an important role in many African ecosystems.