bump vs bump into

bump is a noun but bump into is not a noun.

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

bump (noun)	bump into (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 (verb)	bump into (verb)
knock against with force or violence	collide violently with an obstacle
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