homecoming vs arrival

homecoming and arrival both are nouns.

Word	Noun	Adjective	Verb	Adverb
homecoming	Yes	No	No	No
arrival	Yes	No	No	No

As nouns, arrival is a hypernym of homecoming; that is, arrival is a word with a broader meaning than homecoming:

homecoming (noun)	arrival (noun)
a coming to or returning home	accomplishment of an objective
an annual school or university reunion for graduates	the act of arriving at a certain place
	someone who arrives (or has arrived)