blessedness vs felicity

blessedness and felicity both are nouns.

Word	Noun	Adjective	Verb	Adverb
blessedness	Yes	No	No	No
felicity	Yes	No	No	No

As nouns, felicity is a hypernym of blessedness; that is, felicity is a word with a broader meaning than blessedness:

blessedness: a state of supreme happiness
felicity: state of well-being characterized by emotions ranging from contentment to intense joy

Other hypernyms of blessedness include happiness.

blessedness (noun)	felicity (noun)
a state of supreme happiness	pleasing and appropriate manner or style (especially manner or style of expression)
	state of well-being characterized by emotions ranging from contentment to intense joy