occurrent vs occurrence

occurrent and occurrence both are nouns.

Word	Noun	Adjective	Verb	Adverb
occurrent	Yes	Yes	No	No
occurrence	Yes	No	No	No

As nouns, occurrent and occurrence are synonyms defined as:

Other synonyms of occurrent include happening, natural event.

occurrent (noun)	occurrence (noun)
an event that happens	an event that happens
	an instance of something occurring

occurrent (adjective)	occurrence (adjective)
presently occurring (either causally or incidentally)