Open English Wordnet
Nouns
(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?” Adjectives
(s)behindhaving the lower score or lagging position in a contest“behind by two points”,
“the 8th inning found the home team trailing” Adverbs
(r)behindin or to or toward the rear“he followed behind”,
“seen from behind, the house is more imposing than it is from the front”,
“the final runners were far behind” (r)behindremaining in a place or condition that has been left or departed from“when he died he left much unfinished work behind”,
“left a large family behind”,
“the children left their books behind”,
“he took off with a squeal of tires and left the other cars far behind” (r)behind, slowshowing a time that is earlier than the actual time“the clock is almost an hour slow”,
“my watch is running behind” (r)behindin or into an inferior position“fell behind in his studies”,
“their business was lagging behind in the competition for customers” (r)behind, behindhand, in arrearsin debt“he fell behind with his mortgage payments”,
“a month behind in the rent”,
“a company that has been run behindhand for years”,
“in arrears with their utility bills”