coherency vs cohesiveness

coherency and cohesiveness both are nouns.

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

As nouns, coherency and cohesiveness are synonyms defined as:

Other synonyms of coherency include coherence, cohesion.

coherency (noun)	cohesiveness (noun)
logical and orderly and consistent relation of parts	the property of being cohesive and sticky
the state of cohering or sticking together	the state of cohering or sticking together