polypus vs polyp

polypus and polyp both are nouns.

Word	Noun	Adjective	Verb	Adverb
polypus	Yes	No	No	No
polyp	Yes	No	No	No

As nouns, polypus and polyp are synonyms defined as:

polypus and polyp: a small vascular growth on the surface of a mucous membrane

polypus (noun)	polyp (noun)
a small vascular growth on the surface of a mucous membrane	one of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth
	a small vascular growth on the surface of a mucous membrane