windfall profit vs profits

windfall profit and profits both are nouns.

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

As nouns, profits is a hypernym of windfall profit; that is, profits 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
profits: 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, lucre, net, net income, net profit, profit.

windfall profit (noun)	profits (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)
	something won (especially money)