relatedness vs connectedness

relatedness and connectedness both are nouns.

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

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

relatedness: a particular manner of connectedness
connectedness: a relation between things or events (as in the case of one causing the other or sharing features with it)

Other hypernyms of relatedness include connection, connexion.

relatedness (noun)	connectedness (noun)
a particular manner of connectedness	a relation between things or events (as in the case of one causing the other or sharing features with it)
	the state of being connected