felicity vs blessedness

felicity and blessedness both are nouns.

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

As nouns, blessedness is a hyponym of felicity; that is, blessedness is a word with a more specific, narrower meaning than felicity:

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

Other hyponyms of felicity include beatification, beatitude, radiance.

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