abut vs butt against

abut and butt against both are verbs.

Word	Noun	Adjective	Verb	Adverb
abut	No	No	Yes	No
butt against	No	No	Yes	No

As verbs, abut and butt against are synonyms defined as:

Other synonyms of abut include adjoin, border, butt, butt on, edge, march.

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