natural event vs occurrent

natural event and occurrent both are nouns.

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

As nouns, natural event and occurrent are synonyms defined as:

Other synonyms of natural event include happening, occurrence.

natural event (noun)	occurrent (noun)
an event that happens	an event that happens

natural event (adjective)	occurrent (adjective)
	presently occurring (either causally or incidentally)