inherence vs inherency

inherence and inherency both are nouns.

Word	Noun	Adjective	Verb	Adverb
inherence	Yes	No	No	No
inherency	Yes	No	No	No

As nouns, inherence and inherency are synonyms defined as:

inherence and inherency: the state of inhering; the state of being a fixed characteristic

inherence (noun)	inherency (noun)
the state of inhering; the state of being a fixed characteristic	the state of inhering; the state of being a fixed characteristic