loss vs sum of money

loss and sum of money both are nouns.

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

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

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

loss (noun)	sum of money (noun)
the act of losing someone or something	a quantity of money
the disadvantage that results from losing something
military personnel lost by death or capture
the experience of losing a loved one
euphemistic expressions for death
the amount by which the cost of a business exceeds its revenue
something that is lost
gradual decline in amount or activity