detergency vs detergence

detergency and detergence both are nouns.

Word	Noun	Adjective	Verb	Adverb
detergency	Yes	No	No	No
detergence	Yes	No	No	No

As nouns, detergency and detergence are synonyms defined as:

detergency and detergence: detergent quality; the quality of having cleansing power

detergency (noun)	detergence (noun)
detergent quality; the quality of having cleansing power	detergent quality; the quality of having cleansing power