cohere vs coherency

cohere is not a noun while coherency is a noun.

Word	Noun	Adjective	Verb	Adverb
cohere	No	No	Yes	No
coherency	Yes	No	No	No

cohere (noun)	coherency (noun)
	logical and orderly and consistent relation of parts
	the state of cohering or sticking together

cohere (verb)	coherency (verb)
come or be in close contact with; stick or hold together and resist separation
have internal elements or parts logically connected so that aesthetic consistency results
cause to form a united, orderly, and aesthetically consistent whole