god vs simulacrum

god and simulacrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
god	Yes	No	No	No
simulacrum	Yes	No	No	No

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

god: a material effigy that is worshipped
simulacrum: a representation of a person (especially in the form of sculpture)

Other hypernyms of god include effigy, image.

god (noun)	simulacrum (noun)
a material effigy that is worshipped	a representation of a person (especially in the form of sculpture)
any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force	an insubstantial or vague semblance
a man of such superior qualities that he seems like a deity to other people