cadence vs cadency

cadence and cadency both are nouns.

Word	Noun	Adjective	Verb	Adverb
cadence	Yes	No	No	No
cadency	Yes	No	No	No

As nouns, cadence and cadency are synonyms defined as:

cadence (noun)	cadency (noun)
a recurrent rhythmical series	a recurrent rhythmical series
the close of a musical section
(prosody) the accent in a metrical foot of verse