occasion vs natural event

occasion and natural event both are nouns.

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

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

Other hypernyms of occasion include happening, occurrence, occurrent.

occasion (noun)	natural event (noun)
an event that occurs at a critical time	an event that happens
a formal or official social gathering or ceremony of people
a rational motive for a belief or action
an opportunity to do something
the time of a particular event

occasion (verb)	natural event (verb)
give occasion to