cohesiveness vs coherency

cohesiveness and coherency both are nouns.

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

As nouns, cohesiveness and coherency are synonyms defined as:

Other synonyms of cohesiveness include coherence, cohesion.

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