cohesion vs connectedness

cohesion and connectedness both are nouns.

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

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

Other hypernyms of cohesion include connection, link.

cohesion (noun)	connectedness (noun)
(physics) the intermolecular force that holds together the molecules in a solid or liquid	a relation between things or events (as in the case of one causing the other or sharing features with it)
(botany) the process in some plants of parts growing together that are usually separate (such as petals)	the state of being connected
(linguistics) the grammatical and lexical linking within a text or sentence that holds a text together and gives it meaning.
the state of cohering or sticking together