kill vs killer

kill and killer both are nouns.

Word	Noun	Adjective	Verb	Adverb
kill	Yes	No	Yes	No
killer	Yes	No	No	No

kill (noun)	killer (noun)
the act of terminating a life	predatory black-and-white toothed whale with large dorsal fin; common in cold seas
the destruction of an enemy plane or ship or tank or missile	a difficulty that is hard to deal with
the body of an animal, or bodies of animals, killed by a person or another animal	someone who causes the death of a person or animal
	the causal agent resulting in death

kill (verb)	killer (verb)
mark for deletion, rub off, or erase
destroy a vitally essential quality of or in
cause to cease operating
tire out completely
end or extinguish by forceful means
drink down entirely
cause to die; put to death, usually intentionally or knowingly
cause the death of, without intention
deprive of life
hit with great force
hit with so much force as to make a return impossible, in racket games
overwhelm with hilarity, pleasure, or admiration
be the source of great pain for
thwart the passage of
be fatal