idol vs graven image

idol and graven image both are nouns.

Word	Noun	Adjective	Verb	Adverb
idol	Yes	No	No	No
graven image	Yes	No	No	No

As nouns, idol and graven image are synonyms defined as:

Other synonyms of idol include god.

idol (noun)	graven image (noun)
a material effigy that is worshipped	a material effigy that is worshipped
an ideal instance; a perfect embodiment of a concept
someone who is adored blindly and excessively