killing vs net profit

killing and net profit both are nouns.

Word	Noun	Adjective	Verb	Adverb
killing	Yes	Yes	No	No
net profit	Yes	No	No	No

As nouns, net profit is a hypernym of killing; that is, net profit is a word with a broader meaning than killing:

killing: a very large profit
net profit: the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)

Other hypernyms of killing include earnings, lucre, net, net income, profit, profits.

killing (noun)	net profit (noun)
the act of terminating a life	the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)
an event that causes someone to die
a very large profit

killing (adjective)	net profit (adjective)
very funny