nirvana vs blessedness

nirvana and blessedness both are nouns.

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

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

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

Other hypernyms of nirvana include beatification, beatitude.

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