polyp vs growth

polyp and growth both are nouns.

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

As nouns, growth is a hypernym of polyp; that is, growth is a word with a broader meaning than polyp:

polyp (noun)	growth (noun)
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	the gradual beginning or coming forth
a small vascular growth on the surface of a mucous membrane	vegetation that has grown
	something grown or growing
	(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level
	a progression from simpler to more complex forms
	a process of becoming larger or longer or more numerous or more important
	(pathology) an abnormal proliferation of tissue (as in a tumor)