convergence vs convergency

convergence and convergency both are nouns.

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

As nouns, convergence and convergency are synonyms defined as:

Other synonyms of convergence include converging.

As nouns, convergence and convergency are synonyms defined as:

convergence and convergency: the approach of an infinite series to a finite limit

convergence (noun)	convergency (noun)
the act of converging (coming closer)	the act of converging (coming closer)
the approach of an infinite series to a finite limit	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