project vs cash cow

project and cash cow both are nouns.

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

As nouns, cash cow is a hyponym of project; that is, cash cow is a word with a more specific, narrower meaning than project:

Other hyponyms of project include money-spinner, moneymaker, moonshot.

project (noun)	cash cow (noun)
any piece of work that is undertaken or attempted	a project that generates a continuous flow of money
a planned undertaking

project (verb)	cash cow (verb)
present for consideration, examination, criticism, etc.
regard as objective
communicate vividly
throw, send, or cast forward
transfer (ideas or principles) from one domain into another
imagine; conceive of; see in one's mind
make or work out a plan for; devise
put or send forth
draw a projection of
cause to be heard
project on a screen
extend out or project in space