appearance vs natural event

appearance and natural event both are nouns.

Word	Noun	Adjective	Verb	Adverb
appearance	Yes	No	No	No
natural event	Yes	No	No	No

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

Other hypernyms of appearance include happening, occurrence, occurrent.

appearance (noun)	natural event (noun)
the act of appearing in public view	an event that happens
formal attendance (in court or at a hearing) of a party in an action
pretending that something is the case in order to make a good impression
outward or visible aspect of a person or thing
a mental representation
the event of coming into sight