enrollment vs incoming

enrollment and incoming both are nouns.

Word	Noun	Adjective	Verb	Adverb
enrollment	Yes	No	No	No
incoming	Yes	Yes	No	No

As nouns, incoming is a hypernym of enrollment; that is, incoming is a word with a broader meaning than enrollment:

Other hypernyms of enrollment include entering, entrance, entry, ingress.

enrollment (noun)	incoming (noun)
the act of enrolling	the act of entering
the body of people (such as students) who register or enroll at the same time

enrollment (adjective)	incoming (adjective)
	arriving at a place or position
	entering upon a position of office vacated by another