sun god vs deity

sun god and deity both are nouns.

Word	Noun	Adjective	Verb	Adverb
sun god	Yes	No	No	No
deity	Yes	No	No	No

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

sun god: a god that personifies the sun or is otherwise associated with the sun
deity: 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 sun god include divinity, god, immortal.

sun god (noun)	deity (noun)
a god that personifies the sun or is otherwise associated with the sun	any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force