Princeton's WordNet

1. crap, dirt, shit, shite, poop, turd(noun)

   obscene terms for feces

   Synonyms:
   darn, after part, tail, soil, nincompoop, bull, diddly-squat, grunge, low-down, diddly, cocksucker, dickhead, squat, hoot, diddlyshit, jack, dogshit, the skinny, doodly-squat, bullshit, ninny, stern, diddly-shit, prick, shit, grease, grime, scandal, son of a bitch, crap, tinker's damn, damn, shite, bastard, horseshit, turd, dirt, asshole, diddley, filth, malicious gossip, tinker's dam, diddlysquat, shucks, quarter, red cent, dump, stain, whoreson, poop, dope

2. bullshit, bull, Irish bull, horseshit, shit, crap, dogshit(noun)

   obscene words for unacceptable behavior

   Synonyms:
   darn, cop, bull, diddly-squat, diddly, cocksucker, dickhead, squat, hoot, diddlyshit, fuzz, dogshit, strapper, doodly-squat, bullshit, pig, diddly-shit, prick, shit, jack, son of a bitch, crap, tinker's damn, damn, shite, bastard, horseshit, turd, dirt, asshole, diddley, papal bull, bruiser, tinker's dam, diddlysquat, shucks, red cent, dump, copper, bull's eye, whoreson, poop

3. jack, doodly-squat, diddly-squat, diddlysquat, diddly-shit, diddlyshit, diddly, diddley, squat, shit(noun)

   a small worthless amount

   Synonyms:
   darn, knee bend, diddly-squat, seafarer, jackass, jack, seaman, tar, squatting, laborer, dickhead, squat, hoot, diddlyshit, mariner, dogshit, doodly-squat, gob, diddly-shit, prick, shit, jak, bastard, son of a bitch, crap, tinker's damn, damn, bullshit, sea dog, shite, jackstones, bull, horseshit, turd, dirt, asshole, diddly, shucks, diddlysquat, knave, cocksucker, red cent, tinker's dam, dump, labourer, diddley, poop, whoreson, manual laborer, old salt, jackfruit

4. shit, dump(noun)

   a coarse term for defecation

   Synonyms:
   darn, rubbish dump, wasteyard, bull, diddly-squat, diddly, cocksucker, dickhead, squat, shucks, diddlyshit, jack, dogshit, dumpsite, doodly-squat, bullshit, red cent, hoot, shit, garbage dump, son of a bitch, prick, crap, tinker's damn, damn, shite, bastard, horseshit, turd, dirt, asshole, diddley, waste-yard, tinker's dam, diddlysquat, diddly-shit, dump, whoreson, poop, trash dump

5. asshole, bastard, cocksucker, dickhead, shit, mother fucker, motherfucker, prick, whoreson, son of a bitch, SOB(noun)

   insulting terms of address for people who are stupid or irritating or ridiculous

   Synonyms:
   darn, putz, pricking, shaft, hoot, peter, dogshit, tool, diddley, mongrel, shortness of breath, incision, love child, cocksucker, breathlessness, bunghole, illegitimate, dickhead, squat, illegitimate child, diddlyshit, jack, doodly-squat, bullshit, pecker, diddly-shit, prick, shit, bastard, son of a bitch, crap, tinker's damn, damn, dick, shite, bull, horseshit, turd, dirt, asshole, diddly, by-blow, diddly-squat, tinker's dam, diddlysquat, shucks, arse, cock, red cent, sobbing, slit, dump, arsehole, whoreson, poop, dent, scratch

6. damn, darn, hoot, red cent, shit, shucks, tinker's damn, tinker's dam(verb)

   something of little value

   Synonyms:
   darn, snort, horseshit, diddly, jack, cocksucker, dickhead, squat, shucks, diddlyshit, dogshit, doodly-squat, bullshit, red cent, hoot, shit, bastard, son of a bitch, prick, crap, tinker's damn, damn, shite, bull, razz, turd, dirt, asshole, raspberry, boo, bird, diddly-squat, tinker's dam, diddlysquat, diddly-shit, hiss, diddley, dump, razzing, poop, whoreson, mend, patch

7. denounce, tell on, betray, give away, rat, grass, shit, shop, snitch, stag(verb)

   give away information about somebody

   Synonyms:
   thieve, cop, betray, hook, buy at, stag, let on, mark, stool, reveal, spy, disclose, deceive, expose, defecate, fail, take a shit, frequent, sell, browse, bewray, snoop, snitch, make, brand, fink, lead astray, ca-ca, cheat, shit, give away, grass, break, wander, sleuth, sponsor, crap, shop, glom, grass over, divulge, stigmatize, patronise, shop at, stigmatise, knock off, blackleg, bring out, take a crap, denounce, cuckold, unwrap, patronize, tell on, cheat on, discover, scab, rat, let out

8. stool, defecate, shit, take a shit, take a crap, ca-ca, crap, make(verb)

   have a bowel movement

   Synonyms:
   urinate, earn, betray, take in, pass water, micturate, relieve oneself, score, stag, pull in, progress to, bring in, get, stool, make up, attain, arrive at, cook, cause, make, fix, tiller, gain, defecate, spend a penny, take a shit, wee, hit, reach, take, have, pee-pee, seduce, snitch, stimulate, pee, get to, construct, throw, form, shit, give away, grass, make water, realise, work, do, give, crap, shop, create, induce, take a leak, hold, puddle, clear, lay down, prepare, produce, nominate, wee-wee, establish, ready, piss, name, take a crap, draw, denounce, make believe, constitute, tell on, realize, piddle, pretend, ca-ca, rat, build