OXFORD DICTIONARY
abut, v. (abutted, abutting)
1 intr. (foll. by on) (of estates, countries, etc.) adjoin (another).
2 intr. (foll. by on, against) (of part of a building) touch or lean upon (another) with a projecting end or point (the shed abutted on the side of the house).
3 tr. abut on.
OF abouter (BUTT(1)) and AL abuttare f. OF but end
THESAURUS
abut
abut on, adjoin, appose, be based on, be contiguous, be in contact, bear on, bestraddle, bestride, border, border on, bring near, butt, communicate, conjoin, connect, join, juxtapose, juxtaposit, lean on, lie by, lie on, line, march, neighbor, perch, put with, rely on, repose on, rest on, ride, sit on, stand by, stand on, straddle, stride, touch, verge, verge upon