enrollment vs entering

enrollment and entering both are nouns.

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

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

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

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