war god vs deity

war god and deity both are nouns.

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

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

war god: a god worshipped as giving victory in war
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 war god include divinity, god, immortal.

war god (noun)	deity (noun)
a god worshipped as giving victory in war	any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force