WordNet sense 1 (a victim of ridicule or pranks):

goat, laughingstock, stooge

WordNet sense 2 (the fleshy part of the human body that you sit on):

backside, behind, bottom, bum, buns, buttocks, can, derriere, fanny, hindquarters, posterior, rear, rump, seat, stern, tail, tush, arse, fundament, keister, nates, prat, tooshie, tush, tail end, hind end

WordNet sense 3 (sports equipment consisting of an object set up for a marksman or archer to aim at):

target

WordNet sense 4 (finely ground tobacco wrapped in paper; for smoking):

cigarette, cigaret, coffin nail

WordNet sense 5 (a joint made by fastening ends together without overlapping):

butt joint

WordNet sense 6 (the small unused part of something (especially the end of a cigarette that is left after smoking)):

stub

WordNet sense 7 (thick end of the handle):

butt end

WordNet sense 8 (lie adjacent to another or share a boundary):

abut, adjoin, border, edge, march, butt against

WordNet sense 9 (to strike, thrust or shove against, often with head or horns):

bunt