growth vs ingrowth

growth and ingrowth both are nouns.

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

As nouns, ingrowth is a hyponym of growth; that is, ingrowth is a word with a more specific, narrower meaning than growth:

growth (noun)	ingrowth (noun)
the gradual beginning or coming forth	something that grows inward
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)