coincidence vs co-occurrence

coincidence and co-occurrence both are nouns.

Word	Noun	Adjective	Verb	Adverb
coincidence	Yes	No	No	No
co-occurrence	Yes	No	No	No

As nouns, coincidence and co-occurrence are synonyms defined as:

coincidence and co-occurrence: the temporal property of two things happening at the same time

Other synonyms of coincidence include concurrence, conjunction.

coincidence (noun)	co-occurrence (noun)
the temporal property of two things happening at the same time	the temporal property of two things happening at the same time
the quality of occupying the same position or area in space	an event or situation that happens at the same time as or in connection with another
an event that might have been arranged although it was really accidental