filthy lucre vs earnings

filthy lucre and earnings both are nouns.

Word	Noun	Adjective	Verb	Adverb
filthy lucre	Yes	No	No	No
earnings	Yes	No	No	No

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

filthy lucre: shameful profit
earnings: the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)

Other hypernyms of filthy lucre include lucre, net, net income, net profit, profit, profits.

filthy lucre (noun)	earnings (noun)
shameful profit	something that remunerates
	the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)