pump priming vs outlay

pump priming and outlay both are nouns.

Word	Noun	Adjective	Verb	Adverb
pump priming	Yes	No	No	No
outlay	Yes	No	No	No

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

pump priming: spending money raised by borrowing; used by governments to stimulate their economy
outlay: the act of spending or disbursing money

Other hypernyms of pump priming include disbursal, disbursement, spending.

pump priming (noun)	outlay (noun)
introducing water into a pump to improve the seal and start the water flowing	the act of spending or disbursing money
spending money raised by borrowing; used by governments to stimulate their economy	money paid out; an amount spent