profit vs quick buck

profit and quick buck both are nouns.

Word	Noun	Adjective	Verb	Adverb
profit	Yes	No	Yes	No
quick buck	Yes	No	No	No

As nouns, quick buck is a hyponym of profit; that is, quick buck is a word with a more specific, narrower meaning than profit:

profit: the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)
quick buck: quick or easy earnings

profit (noun)	quick buck (noun)
the advantageous quality of being beneficial	quick or easy earnings
the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)

profit (verb)	quick buck (verb)
make a profit; gain money or materially
derive a benefit from