butt against vs bump into

butt against and bump into both are verbs.

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

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

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

butt against (verb)	bump into (verb)
lie adjacent to another or share a boundary	collide violently with an obstacle
collide violently with an obstacle