nirvana vs heaven

nirvana and heaven both are nouns.

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

As nouns, nirvana and heaven are synonyms defined as:

Other synonyms of nirvana include Eden, paradise, promised land, Shangri-la.

nirvana (noun)	heaven (noun)
any place of complete bliss and delight and peace	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