concurrency vs concurrence

concurrency and concurrence both are nouns.

Word	Noun	Adjective	Verb	Adverb
concurrency	Yes	No	No	No
concurrence	Yes	No	No	No

As nouns, concurrency and concurrence are synonyms defined as:

concurrency and concurrence: acting together, as agents or circumstances or events

As nouns, concurrency and concurrence are synonyms defined as:

concurrency (noun)	concurrence (noun)
acting together, as agents or circumstances or events	acting together, as agents or circumstances or events
agreement of results or opinions	the temporal property of two things happening at the same time
	agreement of results or opinions
	a state of cooperation