burnup vs expenditure

burnup and expenditure both are nouns.

Word	Noun	Adjective	Verb	Adverb
burnup	Yes	No	No	No
expenditure	Yes	No	No	No

As nouns, expenditure is a hypernym of burnup; that is, expenditure is a word with a broader meaning than burnup:

Other hypernyms of burnup include consumption, using up.

burnup (noun)	expenditure (noun)
the amount of fuel used up (as in a nuclear reactor)	the act of spending money for goods or services
a high-speed motorcycle race on a public road	the act of consuming something
	money paid out; an amount spent