expense vs expenditure

expense and expenditure both are nouns.

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

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

Other hypernyms of expense include outgo, outlay, spending.

expense (noun)	expenditure (noun)
a detriment or sacrifice	the act of spending money for goods or services
amounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures)	the act of consuming something
money spent to perform work and usually reimbursed by an employer	money paid out; an amount spent

expense (verb)	expenditure (verb)
reduce the estimated value of something