peanuts vs sum of money

peanuts and sum of money both are nouns.

Word	Noun	Adjective	Verb	Adverb
peanuts	Yes	No	No	No
sum of money	Yes	No	No	No

As nouns, sum of money is a hypernym of peanuts; that is, sum of money is a word with a broader meaning than peanuts:

Other hypernyms of peanuts include amount, amount of money, sum.

peanuts (noun)	sum of money (noun)
an insignificant sum of money; a trifling amount	a quantity of money