coherency vs connectedness

coherency and connectedness both are nouns.

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

As nouns, connectedness is a hypernym of coherency; that is, connectedness is a word with a broader meaning than coherency:

Other hypernyms of coherency include connection, link.

coherency (noun)	connectedness (noun)
logical and orderly and consistent relation of parts	a relation between things or events (as in the case of one causing the other or sharing features with it)
the state of cohering or sticking together	the state of being connected