expenditure vs outgo

expenditure and outgo both are nouns.

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

As nouns, expenditure and outgo are synonyms defined as:

Other synonyms of expenditure include outlay, spending.

expenditure (noun)	outgo (noun)
the act of spending money for goods or services	money paid out; an amount spent
the act of consuming something
money paid out; an amount spent

expenditure (verb)	outgo (verb)
	be or do something to a greater degree