contemporaneity vs coincidence

contemporaneity and coincidence both are nouns.

Word	Noun	Adjective	Verb	Adverb
contemporaneity	Yes	No	No	No
coincidence	Yes	No	No	No

As nouns, coincidence is a hypernym of contemporaneity; that is, coincidence is a word with a broader meaning than contemporaneity:

Other hypernyms of contemporaneity include co-occurrence, concurrence, conjunction.

contemporaneity (noun)	coincidence (noun)
the quality of being current or of the present	the temporal property of two things happening at the same time
the quality of belonging to the same period of time	the quality of occupying the same position or area in space
	an event that might have been arranged although it was really accidental