moneymaker vs cash cow

moneymaker and cash cow both are nouns.

Word	Noun	Adjective	Verb	Adverb
moneymaker	Yes	No	No	No
cash cow	Yes	No	No	No

As nouns, moneymaker and cash cow are synonyms defined as:

moneymaker and cash cow: a project that generates a continuous flow of money

Other synonyms of moneymaker include money-spinner.

moneymaker (noun)	cash cow (noun)
a project that generates a continuous flow of money	a project that generates a continuous flow of money
someone who is successful in accumulating wealth