bump vs bumper

bump and bumper both are nouns.

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

bump (noun)	bumper (noun)
an impact (as from a collision)	a mechanical device consisting of bars at either end of a vehicle to absorb shock and prevent serious damage
something that bulges out or is protuberant or projects from its surroundings	a glass filled to the brim (especially as a toast)
a lump on the body caused by a blow

bump (verb)	bumper (verb)
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