money vs lucre

money and lucre both are nouns.

Word	Noun	Adjective	Verb	Adverb
money	Yes	No	No	No
lucre	Yes	No	No	No

As nouns, lucre is a hyponym of money; that is, lucre is a word with a more specific, narrower meaning than money:

money (noun)	lucre (noun)
the most common medium of exchange; functions as legal tender	the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)
the official currency issued by a government or national bank	informal terms for money
wealth reckoned in terms of money