overlap vs concurrence

overlap and concurrence both are nouns.

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

As nouns, concurrence is a hypernym of overlap; that is, concurrence is a word with a broader meaning than overlap:

Other hypernyms of overlap include co-occurrence, coincidence, conjunction.

overlap (noun)	concurrence (noun)
a flap that lies over another part	acting together, as agents or circumstances or events
the property of partial coincidence in time	the temporal property of two things happening at the same time
a representation of common ground between theories or phenomena	agreement of results or opinions
	a state of cooperation

overlap (verb)	concurrence (verb)
extend over and cover a part of
coincide partially or wholly