earnings vs killing

earnings and killing both are nouns.

Word	Noun	Adjective	Verb	Adverb
earnings	Yes	No	No	No
killing	Yes	Yes	No	No

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

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

earnings (noun)	killing (noun)
something that remunerates	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

earnings (adjective)	killing (adjective)
	very funny