gold standard vs idol

gold standard and idol both are nouns.

Word	Noun	Adjective	Verb	Adverb
gold standard	Yes	No	No	No
idol	Yes	No	No	No

As nouns, idol is a hypernym of gold standard; that is, idol is a word with a broader meaning than gold standard:

Other hypernyms of gold standard include beau ideal, paragon, perfection.

gold standard (noun)	idol (noun)
a paragon of excellence	a material effigy that is worshipped
a monetary standard under which the basic unit of currency is defined by a stated quantity of gold	an ideal instance; a perfect embodiment of a concept
	someone who is adored blindly and excessively