blessedness vs nirvana

blessedness and nirvana both are nouns.

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

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

blessedness: a state of supreme happiness
nirvana: (Hinduism and Buddhism) the beatitude that transcends the cycle of reincarnation; characterized by the extinction of desire and suffering and individual consciousness

Other hyponyms of blessedness include enlightenment.

blessedness (noun)	nirvana (noun)
a state of supreme happiness	any place of complete bliss and delight and peace
	(Hinduism and Buddhism) the beatitude that transcends the cycle of reincarnation; characterized by the extinction of desire and suffering and individual consciousness