appearance vs arrival

appearance and arrival both are nouns.

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

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

appearance (noun)	arrival (noun)
the act of appearing in public view	accomplishment of an objective
formal attendance (in court or at a hearing) of a party in an action	the act of arriving at a certain place
pretending that something is the case in order to make a good impression	someone who arrives (or has arrived)
outward or visible aspect of a person or thing
a mental representation
the event of coming into sight