earth-god vs earth god

earth-god and earth god both are nouns.

Word	Noun	Adjective	Verb	Adverb
earth-god	Yes	No	No	No
earth god	Yes	No	No	No

As nouns, earth-god and earth god are synonyms defined as:

earth-god (noun)	earth god (noun)
a god of fertility and vegetation	a god of fertility and vegetation