bimetallic vs bimetallism

bimetallic is not a noun while bimetallism is a noun.

Word	Noun	Adjective	Verb	Adverb
bimetallic	No	Yes	No	No
bimetallism	Yes	No	No	No

bimetallic (noun)	bimetallism (noun)
	a monetary standard under which the basic unit of currency is defined by stated amounts of two metals (usually gold and silver) with values set at a predetermined ratio

bimetallic (adjective)	bimetallism (adjective)
pertaining to a monetary system based on two metals
formed of two different metals or alloys; especially in sheets bonded together