Persian deity vs immortal

Persian deity and immortal both are nouns.

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

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

Persian deity: a deity worshiped by the ancient Persians
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 Persian deity include deity, divinity, god.

Persian deity (noun)	immortal (noun)
a deity worshiped by the ancient Persians	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

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