folding money vs paper money

folding money and paper money both are nouns.

Word	Noun	Adjective	Verb	Adverb
folding money	Yes	No	No	No
paper money	Yes	No	No	No

As nouns, folding money and paper money are synonyms defined as:

folding money and paper money: currency issued by a government or central bank and consisting of printed paper that can circulate as a substitute for specie

Other synonyms of folding money include paper currency.

folding money (noun)	paper money (noun)
currency issued by a government or central bank and consisting of printed paper that can circulate as a substitute for specie	currency issued by a government or central bank and consisting of printed paper that can circulate as a substitute for specie