windfall profit vs lucre

windfall profit and lucre both are nouns.

Word	Noun	Adjective	Verb	Adverb
windfall profit	Yes	No	No	No
lucre	Yes	No	No	No

As nouns, lucre is a hypernym of windfall profit; that is, lucre is a word with a broader meaning than windfall profit:

windfall profit: profit that occurs unexpectedly as a consequence of some event not controlled by those who profit from it
lucre: the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)

Other hypernyms of windfall profit include earnings, net, net income, net profit, profit, profits.

windfall profit (noun)	lucre (noun)
profit that occurs unexpectedly as a consequence of some event not controlled by those who profit from it	the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)
	informal terms for money