Egyptian deity vs immortal

Egyptian deity and immortal both are nouns.

Word	Noun	Adjective	Verb	Adverb
Egyptian deity	Yes	No	No	No
immortal	Yes	Yes	No	No

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

Egyptian deity: a deity worshipped by the ancient Egyptians
immortal: any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force

Other hypernyms of Egyptian deity include deity, divinity, god.

Egyptian deity (noun)	immortal (noun)
a deity worshipped by the ancient Egyptians	any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force
	a person (such as an author) of enduring fame

Egyptian deity (adjective)	immortal (adjective)
	not subject to death