outgo vs expense

outgo and expense both are nouns.

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

As nouns, expense is a hyponym of outgo; that is, expense is a word with a more specific, narrower meaning than outgo:

Other hyponyms of outgo include cost, transfer payment.

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

outgo (verb)	expense (verb)
be or do something to a greater degree	reduce the estimated value of something