Open English Wordnet
Nouns
(n)buttthe part of a plant from which the roots spring or the part of a stalk or trunk nearest the roots (n)buttocks, nates, arse, butt, backside, bum, buns, can, fundament, hindquarters, hind end, keister, posterior, prat, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush, bottom, behind, derriere, fanny, assthe fleshy part of the human body that you sit on“he deserves a good kick in the butt”,
“are you going to sit on your fanny and do nothing?” (n)target, buttsports equipment consisting of an object set up for a marksman or archer to aim at (n)butt joint, butta joint made by fastening ends together without overlapping (n)butta large cask (especially one holding a volume equivalent to 2 hogsheads or 126 gallons) (n)butt, stubthe small unused part of something (especially the end of a cigarette that is left after smoking) Verbs
(v)butt, buntto strike, thrust or shove against“He butted his sister out of the way”,
“The goat butted the hiker with his horns” (v)buttplace end to end without overlapping“The frames must be butted at the joints” 