coherency vs cohere

coherency is a noun but cohere is not a noun.

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

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

coherency (verb)	cohere (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