advance, ahead, bring forward, face, forrad, forrard, forward, forwards, front, frontward, frontwards, look

canalis vertebralis, coccyx, dorsal vertebra, lat, latisimus dorsi, lumbar vertebra, saddle, small, spinal canal, tail bone, vertebra, vertebral canal

out, down, off, then, again, away, forth, forward, finally, ahead, just, right, closer, straight, before, backwards, hopefully, here, behind, thataway, through, around, now, together, outta, instead, onward, eventually, someplace, outa, really, once, unstuck, anyway, along, over, farther, maybe, somewhere, soon, keisters, early, hark, wherever, inside, okay, alright, awhile, hard, all, brass knucks, outside, beyond, still, definitely, later, suddenly, sideways, basically, across, underneath, loose, aside, squarely, obviously, frontward, headlong, homeward, ashore, briefly, first, slowly, literally, afresh, gustiest, alongside, upwards, luckily, wobbly, halfway, actually, upstairs, dig deep, awkwardly, desperately, straightaway, clean slate, outpower, unceremoniously, onside, within, jharal, unglued, inwards, little, calmy, allright, whatever, backs, yonder, band, chest, rump, tail, top, bench, fender, sides, stern, an, belly, butt, door, floating, fore, hanging, line, front, rear, littered, unlit, sunlit, lit, rearmost, cluttered, lighted, paved, railed, rectory, shaded, shadowed, unlighted, unoccupied, adjoining, bricked

after part, ante, back out, cantle, champion, chine, defend, double up, empennage, field general, fullback, guarantee, halfback, half binding, ladder-back, notochord, parlay, poop, quarter, quarterback, root, running back, side, signal caller, stern, tail, tailback, tail assembly, three-quarter binding, vouch, warrant, wingback

., a. e. kennelly, abjuration, accordion door, acherontia atropos, acoustic modem, aetobatus narinari, african green monkey, agitate, ahorse, ahorseback, alex haley, allegheny, allegheny river, alligator snapper, alligator snapping turtle, alternate, alternation, american flagfish, amphitropous, amphitropous ovule, anatropous, anatropous ovule, ankylosaur, ankylosaurus, answer, antecede, antedate, antepenult, antepenultimate, antilope cervicapra, antimacassar, aortic valve, ao dai, appendix, arab-israeli war, arc, arch, argonne, argonne forest, arkansas kingbird, arrest, arteria basilaris, arteria lumbalis, arthur edwin kennelly, arytaenoid, arytenoid, arytenoid cartilage, ascend, askance, at a premium, authorizer, back-channel, back-geared, back-to-back, backa, backache, backband, backboard, backcloth, backdrop, backed, background, backhand, backhanda, backhanded, backhand shot, backhand stroke, backing, backlash, backless, backlog, backpack, backpacking, backplate, backscratcher, backspacer, backspace key, backstay, backstroke, backswimmer, backward, backwards, backward and forward, backwater, backyard, back and forth, back brace, back burner, back channel, back circle, back door, back down, back exercise, back of beyond, back pack, back porch, back tooth, back up, bacon, bad, badger skunk, bag, bandaged, bandy, baseline, basilar artery, basilic vein, bated, beat back, believe, bench press, bend, bended, bent, berlin, bestride, binding, black-backed gull, black-necked stilt, blackbuck, black buck, blowhole, bob, bobtail, book binding, boston rocker, bounce, bound, bow, bowed, brandish, brass knuckles, brass knucks, breaststroke, bring, bring around, bring back, bring round, bring to, broken-backed, brush, buck, bustle, butt pack, buyback, cacuminal, calf, call back, cantle, captain's chair, carbon cycle, carcinomatous myopathy, carpet snake, casual, catch, cavalry sword, cd, ceding back, centering, ceras, cercopithecus aethiops sabaeus, chair, check, checked, chiropractic, clarity, clawback, click beetle, climb on, clip, coattail, cob, come back, coming back, common iguana, communications satellite, commute, compact disc, compact disk, conceal, conepatus leuconotus, confine, constrain, contain, converge, convey, coonskin, coonskin cap, coracias garrulus, corselet, corslet, cosmetic surgery, counter, countermarch, count off, cover, cowl muscle, crack, crested screamer, crick, cringe, crookback, crooked, crop, crosshead, crotalus tigris, crouch, crupper, cryonics, cuff, cuirass, cumber, cup, curbed, curtainless, cut, cutaway, cutter, cut back, dawdle, dazzled, death's-head moth, deck tennis, deep, deerstalker, defect, defer, deflate, dejectedly, detached retina, detachment of the retina, dickey, dickey-seat, dickie, dickie-seat, dicky, dicky-seat, dig, disfigurement, dispatched, diver, do-si-do, doo-wop, dorsal, dorsoventral, dorsum, drained, draw, draw back, draw play, dress, drive, drive back, drop back, dwell, eames chair, eaton-lambert syndrome, ebb, ebb away, ebb down, ebb off, ebb out, eddy, egyptian, embankment, encumber, epiphysis, epiphysis cerebri, equid, equine, european roller, exhilarated, extend, facelift, face lift, face lifting, fairy shrimp, fall back, fall behind, fall from grace, family xylariaceae, fanny pack, fasten, fatback, fauces, feedback circuit, feedback loop, fetch, fibular vein, fight off, find, finish, fixed up, flagfish, flanker, flanker back, flare, flare pass, flat, flexible, flicker, flinch, flitter, flourish, flow, flutter, fly, flyleaf, fly sheet, foil, folding door, foliate, force back, forego, four-lined leaf bug, four-lined plant bug, frock coat, from way back, fullback, full nelson, funk, gag reflex, galictis vittatus, gall, gastrocnemius, gastrocnemius muscle, gazetteer, get, get back, get on, give back, glare, glengarry, glossopharyngeal nerve, glossoptosis, go back, grayback, great black-backed gull, greenhouse effect, greenmail, green monkey, grin, grison, grison vittatus, ground, guttural, guttural consonant, haley, half-bound, halfback, half nelson, halter, hammerlock, hamstring, hamstring tendon, handspring, hang up, harbor, harbour, hardback, hardbacked, hardbound, hardcover, hard tick, hark back, harmonica, harp, hash over, havelock, haversack, head, headrest, head restraint, heartsick, heaviside, heel, helen, helen of troy, hem, hesitate, high-backed, himantopus mexicanus, hinda, hindera, hindquarter, hind leg, hippotragus niger, hitch, hog-nosed skunk, hognosed skunk, hold, hold back, hold in, hold over, hometown, hoodoo, hopscotch, hop on, horseback, houdah, howdah, huffily, hump, humpback, humpback whale, humpty dumpty, hunch, hunchback, hunched, hunch forward, hunch over, hunt, hurt, iguana, iguana iguana, ileocecal valve, inclined, incurvate, inertia, inhibited, inion, insult, inverted, in condition, in full view, in kind, ixodid, jerk, jordanella floridae, jump, jump on, keep back, kennelly, kick, kick back, kick pleat, kip, knapsack, knuckles, knuckle duster, knucks, ladder-back, ladder-back chair, lag, lambert-eaton syndrome, land, landau, lapse, largely, larus marinus, lat, latchkey, later, latisimus dorsi, lawn tennis, lem, liability, license plate, lift, limnodromus griseus, line spectrum, lithotomy position, lobster thermidor, lobworm, log, loin, look back, look backward, loon, loop gain, lop, lot, lot's wife, lounger, low-backed, low-cut, lug, lugworm, lumbago, lumbar, lumbar artery, lumbar pain, lumbosacral, lunar excursion module, lunar module, luxate, macroclemys temmincki, madly, maquiladora, mark, martingale, massage, meanwhile, megaptera novaeangliae, mesentery, mesocolon, mess jacket, meuse, meuse-argonne, meuse-argonne operation, meuse river, monkey jacket, morelia spilotes variegatus, morning coat, morris chair, mount, mount up, mouth harp, mouth organ, move back, musculospiral nerve, musculus trapezius, myasthenic syndrome, nape, neck, nervus glossopharyngeus, nervus radialis, neurodermatitis, neutral, next, niche, ninth cranial nerve, nip and tuck, nitrogen cycle, nod, notonecta undulata, nucha, numberplate, nurse, nyala, occipital bone, occipital lobe, occiput, odontoid process, old english sheepdog, old latin, oliver heaviside, opisthotonos, ordinary, ordinary bicycle, orienting, oropharynx, orpheus, os palatinum, over-the-shoulder bombing, oyster, pack, packing, packsack, palatine, palatine bone, pallium, panic-stricken, pastor roseus, pastor sturnus, peer, percolator, percuss, peroneal vein, pharyngeal reflex, phone, pickaback, pig-a-back, piggyback, pinch, pineal body, pineal gland, pipa americana, pipa pipa, place, plait, plant, pleat, poecilocapsus lineatus, pollard, polonaise, ponytail, posterior, posteriority, posterior naris, postpone, precede, precentral gyrus, predate, preposterous, prorogue, prune, pruned, pullback, pulled, pulling, pull away, pull back, pulmonary valve, pump action, pursued, push back, put back, put off, put over, python variegatus, quail, queue, quiver, rabbit punch, radar echo, radial nerve, rainfly, raja radiata, ransom, razor-backed, razorback, razorbacked hog, razorback hog, reacquired stock, readjust, rear, reara, rearward, rearwarda, rearwards, rear window, reason, rebound, rebuff, recall, recantation, recapture, recede, recedinga, recess, recession, recidivate, reciprocation, reclaim, recliner, reclining chair, recoil, recommit, reconvert, recover, recurring, recurve, redeem, redeemer, redemption, reduce, reduxip, reecho, reestablish, reference, reflect, reflected, reflection, reflexion, reflexive, reflux condenser, refrain, refund, regain, regaining, regress, regurgitate, rehash, reimburse, reinstate, reinvent, rejoin, relapse, relation, relation back, remand, remit, renal colic, renascent, render, repatriate, repay, repel, repercussion, replace, repossess, repulse, repurchase, reservation, reserve, reserve assets, resignedly, resile, resilience, resiliency, rested, restitute, restitution, restoration, restore, restored, restrain, resurgent, resuspend, retake, retaking, retardation, retina, retinal detachment, retire, retort, retrace, retracted, retractile, retraction, retractor, retreat, retreating, retrieve, retroflection, retroflex, retroflexion, retrograde, retrogress, retrospect, retroversion, retrovert, return, returninga, return ticket, revenant, reverberate, revere, revers, reverse, reverse hang, reversive, revert, review, revive, rhomboid, rhomboid muscle, rhythmically, rhytidectomy, rhytidoplasty, rick, ricochet, ride, riposte, roach, rock, rollback, rooter skunk, roots, rose-colored pastor, rose-colored starling, round-backed, round-shouldered, round-trip light time, round-trip ticket, round trip, rtlt, rucksack, rumble seat, running back, rush, rutilus rutilus, saber, sable antelope, sabre, sack coat, saddle, saddle feather, saddle hackle, saddle sore, salt pork, sandwich board, sass, satellite television, satellite tv, satin, scrub, scruff, sculler, sea mouse, secured bond, self-referent, sell short, semilunar valve, service line, settee, settle, set back, sewing, sex, shake, shaking, shave, sheepishly, shell jacket, shelve, shield, short sale, short saphenous vein, short selling, shrink, shuffle, shuttle, shuttle diplomacy, shuttle helicopter, sight, silverback, sisyphus, sit, skipjack, sky wave, slapper, sleepily, slide action, sloth, small, smooch, snap, snapping beetle, sniff, snip, snog, snood, soak, sometimes, sou'wester, spatchcock, spider, splat, split, spongelike, spongy, spoon, spotted eagle ray, spotted ray, spring, square one, squinch, stand up, stegosaur, stegosaurus, stegosaur stenops, stem, stem turn, step, stiff-backed, stockpile, stone-cold, stool, stoop, stooped, stooping, stop, stop over, store, straight-backed, strappado, streamer fly, sublimate, sublime, supinate, supinely, sura, surinam toad, swallow, swallow-tailed coat, swallowtail, swallow dive, swan dive, sway, swing, swinging, table, tailback, take a hop, take back, tangled, tape player, tasmanian tiger, tasmanian wolf, tea-strainer, telemeter, telephone, telephone set, tennis, tension headache, tent-fly, tent flap, the living dead, thorny skate, three-point turn, thrown, throw back, thylacine, thylacinus cynocephalus, tieback, tiered seats, tiger rattlesnake, time, tip in, toe-in, toss back, to and fro, trace, tragelaphus angasi, train, transduction, trapezius, trapezius muscle, travel back and forth, treasury shares, treasury stock, tree sloth, trim, tumble, turn, turnup, turn back, twist, unbowed, undulation, united states customary system, unreflected, unsatisfactory, unsay, upstage, upstart, uvula, vacillation, vanishing, vcr, velar, velvet, vena basilica, vena peroneus, vena vorticosum, vent, vibrate, videocassette recorder, vortex vein, vorticose vein, waffle, walk-ina, wall, waste, water back, wave, waver, western kingbird, wiggliness, wince, window, windsor chair, wingback, wing chair, withdraw, withers, withhold, withholder, withholding, working group, wrick, xanthoma, xylariaceae, yalu river, yodeling, yom kippur war, zebu, zombi, zombie

axial skeleton, body, book, car seat, chair, torso, trunk, volume

back up, bet, body part, change over, cloth covering, finance, footballer, football player, lie, place, position, protection, protective covering, reenforce, reinforce, shift, side, skeletal structure, strengthen, support, switch, turn around, wager

back up, backbone, backmost, backrest, backward, backwards, bet on, binding, book binding, cover, dorsum, endorse, gage, game, hind, hinder, hindermost, hindmost, in reply, indorse, noncurrent, plump for, plunk for, posterior, punt, rear, rearmost, rearward, rearwards, second, spinal column, spine, stake, substantiate, support, vertebral column