Hippopotamus amphibius vs hippopotamus

Hippopotamus amphibius and hippopotamus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hippopotamus amphibius	Yes	No	No	No
hippopotamus	Yes	No	No	No

As nouns, Hippopotamus amphibius and hippopotamus are synonyms defined as:

Hippopotamus amphibius and hippopotamus: massive thick-skinned herbivorous animal living in or around rivers of tropical Africa

Other synonyms of Hippopotamus amphibius include hippo, river horse.

Hippopotamus amphibius (noun)	hippopotamus (noun)
massive thick-skinned herbivorous animal living in or around rivers of tropical Africa	massive thick-skinned herbivorous animal living in or around rivers of tropical Africa