expending vs outlay

expending and outlay both are nouns.

Word	Noun	Adjective	Verb	Adverb
expending	Yes	No	No	No
outlay	Yes	No	No	No

As nouns, outlay is a hypernym of expending; that is, outlay is a word with a broader meaning than expending:

Other hypernyms of expending include disbursal, disbursement, spending.

expending (noun)	outlay (noun)
the act of spending money for goods or services	the act of spending or disbursing money
	money paid out; an amount spent