accelerate, apace, chop-chop, fast, quicken, quickly, rapidly, speed, speedily, speed up

sluggish, fast, rapid, gradual, accelerated, steady, uneven, quicker, tepid, lackadaisical, quickening, lethargic, brisk, fitful, bumpy, decelerated, stalled, subpar, speedier, lackluster, anemic, stagnant, laggardly, patchy, delayed, tardy, swift, feeble, torpid, timid, methodical, laborious, muted, bog, smooth, stifled, weak, spotty, jerkier, languid, stunted, sputtered, erratic, sloppy, limp, haphazard, subdued, inexorable, frustrating, impatient, cautious, shift gears, winded, cooled, rocky, glacial, shaky, choppy, faltering, unsteady, languorous, blunted, poky, tedious, slack, chug, dilatory, aggressive, unrushed, ponderous, torrid, deliberate, lukewarm, talkier, cumbersome, modest, quiet, steep, sedate, jumpy, tame, mistime, interrupt, jack rabbit, snail, disjointed, methodic, unhurried, soft, slapdash, bottlenecked, scattershot, fizzling, leisurely, sparse, relentless, slicken, little, paced, short circuiting, inconsistent, halfhearted, hard, heavy, hot, queer, cheap, fall, keen, sinking, small, low, take, draw, get, near, sure, close, go, high, moving, passing, slower, faster, slowest, swifter, unstoppable, jerky, quickest, quick, spontaneous, continous

bog, bog down, clog, delay, detain, hold up, slow down, slow up

., adagio, agonizingly, american turkey oak, american white oak, amsonia tabernaemontana, ancient pine, andante, arava, ariocarpus, athetosis, atlantic white cedar, barrenwort, bayou, bishop's hat, blue star, bog, bog down, boringly, bottleneck, bottom fermentation, bovine, bradycardia, brake, brakes, brake light, brake system, brasenia schreberi, bristlecone pine, buxus sempervirens, capture, cellulose triacetate, chamaecyparis thyoides, charcot-marie-tooth disease, check, choke, cjd, coast white cedar, common box, coot, copernicia, crawl, crawling, creep, creeping, creeping snowberry, creeps, creutzfeldt-jakob disease, dazed, dead march, delay, denazification, dense, denseness, dilatory, dim, dissatisfaction, double time, drag, dragging, drawl, dull, dullness, dulness, dumb, dumbness, dunce's cap, dunce cap, enchondroma, english yew, epimedium grandiflorum, european box, exchange transfusion, exudation, fabian, fadeout, family lorisidae, family potamogetonaceae, fishtail, flat-footed, floppy, floppy disk, foggy, fool's cap, forbearing, fox-trot, foxtrot, funeral march, gaultheria hispidula, genus ariocarpus, genus copernicia, go-slow, groggy, growing, handwriting, heavy, hereditary motor and sensory neuropathy, hiba arborvitae, horned pondweed, hornwort, hypopnea, impeded, indolent, inert, infiltration, intravenous drip, iron-tree, ironwood, ironwood tree, iron tree, ischemic anoxia, ischemic hypoxia, jakob-creutzfeldt disease, japanese spurge, jog, jogger, landing flap, landler, larghetto, larghissimo, largo, lazily, leaden, leflunomide, lentissimo, lento, liberty ship, libration, lingeringly, logy, longanimous, lope, lorisidae, lumbering, maidenhair berry, matchlock, maxwell's demon, meningioma, moderator, movement, moxie plum, myotonia, myotonia atrophica, myotonic dystrophy, myotonic muscular dystrophy, nonreader, obtuse, obtuseness, old world yew, osteoma, pace, pachysandra terminalis, pacing, percolation, phosphorescent, pinus aristata, pinus longaeva, plodding, plutonium 239, ponderous, pondweed family, post-rotational nystagmus, potamogetonaceae, precession of the equinoxes, protractedly, puff, pull, punctuated equilibrium, quercus alba, quercus laevis, quickstep, ranunculus aquatilis, receding, rein, rein in, retard, retarded, retarded depression, retrorocket, roasting, rocky mountain bristlecone pine, rotational nystagmus, saraband, schottische, set back, shamble, shambling, shooting, shuffle, shuffling, sinking, slack, slacken, sloth, slow-moving, slow-wittedness, slow down, slow up, slow virus, sluggish, southern white cedar, stagflation, stagnant anoxia, stagnant hypoxia, steinert's disease, stooge, stoplight, stuporous, susurrous, t'ai chi, t'ai chi chuan, tai chi, tai chi chuan, taxus baccata, theory of punctuated equilibrium, thujopsis dolobrata, torpid, transudation, tree sloth, triacetate, trot, turkey oak, unapprehensive, unready, walk, water-shield, water-target, water buttercup, water crowfoot, white cedar, white cypress, wreathe, zannichellia palustris

decelerate, retard, slow down, slow up, weaken

adagio, andante, behind, boring, bumper-to-bumper, crawling, dawdling, deadening, decelerate, dense, dilatory, dim, dragging, drawling, drawn-out, dull, dumb, easy, ho-hum, inactive, irksome, laggard, larghetto, larghissimo, largo, lazy, lentissimo, lento, long-play, long-playing, moderato, obtuse, pokey, poky, retard, slack, slacken, slow-moving, slow down, slow up, slowly, sluggish, stupid, tardily, tedious, tiresome, uninteresting, wearisome