bump off vs bump

bump off is not a noun while bump is a noun.

Word	Noun	Adjective	Verb	Adverb
bump off	No	No	Yes	No
bump	Yes	No	Yes	No

bump off (noun)	bump (noun)
	an impact (as from a collision)
	something that bulges out or is protuberant or projects from its surroundings
	a lump on the body caused by a blow

bump off (verb)	bump (verb)
kill intentionally and with premeditation	knock against with force or violence
	remove or force from a position of dwelling previously occupied
	to play music at loud volume
	to enjoy some music greatly
	dance erotically or dance with the pelvis thrust forward
	come upon, as if by accident; meet with
	assign to a lower position; reduce in rank