avatar vs Hindu deity

avatar and Hindu deity both are nouns.

Word	Noun	Adjective	Verb	Adverb
avatar	Yes	No	No	No
Hindu deity	Yes	No	No	No

As nouns, Hindu deity is a hypernym of avatar; that is, Hindu deity is a word with a broader meaning than avatar:

avatar: the manifestation of a Hindu deity (especially Vishnu) in human or superhuman or animal form
Hindu deity: a deity worshipped by the Hindus

avatar (noun)	Hindu deity (noun)
the manifestation of a Hindu deity (especially Vishnu) in human or superhuman or animal form	a deity worshipped by the Hindus
a new personification of a familiar idea