dollar vs Federal Reserve note

dollar and Federal Reserve note both are nouns.

Word	Noun	Adjective	Verb	Adverb
dollar	Yes	No	No	No
Federal Reserve note	Yes	No	No	No

As nouns, Federal Reserve note is a hypernym of dollar; that is, Federal Reserve note is a word with a broader meaning than dollar:

dollar: a piece of paper money worth one dollar
Federal Reserve note: a piece of paper money (especially one issued by a central bank)

Other hypernyms of dollar include bank bill, bank note, banker's bill, banknote, bill, government note, greenback, note.

dollar (noun)	Federal Reserve note (noun)
a symbol of commercialism or greed	a piece of paper money (especially one issued by a central bank)
a piece of paper money worth one dollar
a United States coin worth one dollar
the basic monetary unit in many countries; equal to 100 cents