innocency vs innocence

innocency and innocence both are nouns.

Word	Noun	Adjective	Verb	Adverb
innocency	Yes	No	No	No
innocence	Yes	No	No	No

As nouns, innocence is a hypernym of innocency; that is, innocence is a word with a broader meaning than innocency:

Other hypernyms of innocency include artlessness, ingenuousness, naturalness.

innocency (noun)	innocence (noun)
an innocent quality or thing or act	the quality of innocent naivete
	a state or condition of being innocent of a specific crime or offense
	the state of being unsullied by sin or moral wrong; lacking a knowledge of evil