N. changeableness, mutability, inconstancy, versatility, mobility, instability, unstable equilibrium, vacillation, fluctuation, vicissitude, alternation, restlessness, fidgets, disquiet, disquietude, inquietude, unrest, agitation, moon, proteus, chameleon, quicksilver, shifting sands, weathercock, harlequin, cynthia of the minute, april showers, wheel of fortune, transientness

V. fluctuate, vary, waver, flounder, flicker, flitter, flit, flutter, shift, shuffle, shake, totter, tremble, vacillate, wamble, turn and turn about, ring the changes, sway to and fro, shift to and fro, change and change about, waffle, blow with the wind (irresolute) 605, oscillate, vibrate between, two extremes, oscillate between, two extremes, alternate, have as many phases as the moon

Adj. changeable, changeful, changing, mutable, variable, checkered, ever changing, protean, proteiform|, versatile, unstaid, inconstant, unsteady, unstable, unfixed, unsettled, fluctuating, restless, agitated, erratic, fickle, irresolute, capricious, touch and go, inconsonant, fitful, spasmodic, vibratory, vagrant, wayward, desultory, afloat, alternating, alterable, plastic, mobile, transient, wavering

Adv. seesaw, off and on

Phr. "a rolling stone gathers no moss", pictra mossa non fa muschis, honores mutant mores, varium et mutabile semper femina

N. energy, physical energy, force, power &c. # 157, keenness, intensity, vigor, strength, elasticity, go, high pressure, fire, rush, acrimony, acritude, causiticity, virulence, poignancy, harshness, severity, edge, point, pungency, cantharides, seasoning, activity, agitation, effervescence, ferment, fermentation, ebullition, splutter, perturbation, stir, bustle, voluntary energy, quicksilver, resolution, exertion, excitation

V. give -energy, energize, stimulate, kindle, excite, exert, sharpen, intensify, inflame, wind up, strike home, into home, hard home, make an impression

Adj. strong, energetic, forcible, active, intense, deep-dyed, severe, keen, vivid, sharp, acute, incisive, trenchant, brisk, rousing, irritation, poignant, virulent, caustic, corrosive, mordant, harsh, stringent, double-edged, double-shotted, double-distilled, drastic, escharotic|, racy, potent, radioactive

Adv. strongly, fortiter in re, with telling effect

Phr. the steam is up, vires acquirit eundo, "the race by vigor not by vaunts is won"

N. velocity, speed, celerity, swiftness, rapidity, eagle speed, expedition, pernicity|, acceleration, haste, spurt, rush, dash, race, steeple chase, smart rate, lively rate, swift rate, rattling rate, spanking rate, strapping rate, smart pace, lively pace, swift pace, rattling pace, spanking pace, strapping pace, round pace, flying, flight, lightning, greased lightning, light, electricity, wind, cannon ball, rocket, arrow, dart, hydrargyrum, quicksilver, telegraph, express train, torrent, eagle, antelope, courser, race horse, gazelle, greyhound, hare, doe, squirrel, camel bird, chickaree, chipmunk, hackee, ostrich, scorcher*, mercury, ariel, camilla, harlequin, log, log line, speedometer, odometer, tachometer, strobe, radar speed detector, radar trap, air speed gauge, wind sock, wind speed meter, pedometer

V. move quickly, trip, fisk|, speed, hie, hasten, post, spank, scuttle, scud, scuddle, scour, scour the plain, scamper, run like mad, beat it, fly, race, run a race, cut away, shot, tear, whisk, zoom, swoosh, sweep, skim, brush, cut along, bowl along, barrel along, barrel, scorch, burn up the track, rush, dash on, dash off, dash forward, bolt, trot, gallop, amble, troll, bound, flit, spring, dart, boom, march in quick time, march in double time, ride hard, get over the ground, hurry, accelerate, put on, quicken, quicken one's pace, mend one's pace, clap spurs to one's horse, make haste, make rapid strides, make forced marches, make the best of one's way, put one's best leg foremost, stir one's stumps, wing one's way, set off at a score, carry sail, crowd sail, go off like a shot, go like a shot, go ahead, gain ground, outstrip the wind, fly on the wings of the wind, keep up with, keep pace with, outstrip, outmarch

Adj. fast, speedy, swift, rapid, quick, fleet, aliped, nimble, agile, expeditious, express, active, flying, galloping, light footed, nimble footed, winged, eagle winged, mercurial, electric, telegraphic, light-legged, light of heel, swift as an arrow, quick as lightning, quick as a thought

Adv. swiftly, with speed, apace, at a great rate, at full speed, at railway speed, full drive, full gallop, posthaste, in full sail, tantivy, trippingly, instantaneously, under press of sail, under press of canvas, under press of sail and steam, velis et remis, on eagle's wing, in double quick time, with rapid strides, with giant strides, a pas de geant, in seven league boots, whip and spur, ventre a terre, as fast as one's legs will carry one, as fast as one's heels will carry one, as fast as one can lay legs to the ground, at the top of one's speed, by leaps and bounds, with haste

Phr. vires acquirit eundo, "i'll put a girdle about the earth in forty minutes", "swifter than arrow from the tartar's bow", go like a bat out of hell, tempus fugit