convergence vs happening

convergence and happening both are nouns.

Word	Noun	Adjective	Verb	Adverb
convergence	Yes	No	No	No
happening	Yes	No	No	No

As nouns, happening is a hypernym of convergence; that is, happening is a word with a broader meaning than convergence:

Other hypernyms of convergence include natural event, occurrence, occurrent.

convergence (noun)	happening (noun)
the act of converging (coming closer)	an event that happens
the approach of an infinite series to a finite limit
a representation of common ground between theories or phenomena
the occurrence of two or more things coming together