knock against vs bump into

knock against and bump into both are verbs.

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

As verbs, knock against and bump into are synonyms defined as:

Other synonyms of knock against include butt against, jar against, run into.

knock against (verb)	bump into (verb)
collide violently with an obstacle	collide violently with an obstacle