perturbation

• POS: Noun
• HYPHEN: per=tur=ba=tion

CIDE DICTIONARY

perturbation, n. [L. perturbatio: cf. F. perturbation.].

•  The act of perturbing, or the state of being perturbed; esp., agitation of mind.  [1913 Webster]
•  A disturbance in the regular elliptic or other motion of a heavenly body, produced by some force additional to that which causes its regular motion; as, the perturbations of the planets are caused by their attraction on each other.  Newcomb.  [1913 Webster]

OXFORD DICTIONARY

perturbation, n.
1 the act or an instance of perturbing; the state of being perturbed.
2 a cause of disturbance or agitation.
3 Physics a slight alteration of a physical system, e.g. of the electrons in an atom, caused by a secondary influence.
4 Astron. a minor deviation in the course of a celestial body, caused by the attraction of a neighbouring body.

THESAURUS

perturbation

ado, aggravation, agitation, all-overs, angst, animation, anxiety, anxiety hysteria, anxiety neurosis, anxious bench, anxious concern, anxious seat, anxiousness, apprehension, apprehensiveness, arousal, arousing, baffle, bafflement, befuddlement, bewilderment, bluster, bobbery, boil, boiling, bother, botheration, brouhaha, bustle, cankerworm of care, care, chaos, chills of fear, churn, cloud, cold creeps, cold shivers, cold sweat, commotion, concern, concernment, confoundment, confusion, conturbation, convulsion, creeps, daze, derangement, dilemma, disarrangement, disarray, disarticulation, discombobulation, discomfiture, discomposure, disconcert, disconcertedness, disconcertion, disconcertment, disharmony, dishevelment, disintegration, disjunction, dislocation, disorder, disorderliness, disorganization, disorientation, disproportion, disquiet, disquietude, disruption, distress, disturbance, dread, ebullience, ebullition, eddy, effervescence, electrification, embarrassment, embroilment, enigma, entropy, exacerbation, exasperation, excitation, excitement, exhilaration, fear, fear and trembling, feery-fary, ferment, fermentation, fever, feverishness, fidgets, fix, flap, flummox, flurry, fluster, flutter, flutteration, fog, foment, fomentation, foreboding, forebodingness, frenzy, fuddle, fuddlement, fume, fuss, galvanization, goose bumps, gooseflesh, haphazardness, haze, heartquake, horripilation, hubbub, hurly-burly, hurry, hurry-scurry, incitement, incoherence, indiscriminateness, inflammation, infuriation, inharmonious harmony, inquietude, insanity, irregularity, irritation, jam, jimjams, jitters, jumble, jumpiness, lathering up, maelstrom, malaise, maze, mess, misarrangement, misgiving, mist, moil, most admired disorder, muddle, muddlement, mystery, nerviness, nervous tension, nervousness, nonplus, nonsymmetry, nonuniformity, overanxiety, palpitation, pell-mell, perplexity, pickle, pins and needles, plight, pother, predicament, problem, promiscuity, promiscuousness, provocation, pucker, puzzle, puzzlement, quaking, quandary, quiver of terror, randomness, restlessness, riddle, roil, rout, row, ruffle, scrape, seethe, seething, shivers, shuffle, shuffling, solicitude, steaming up, stew, stimulation, stimulus, stir, stirring, stirring up, strain, suspense, sweat, swirl, swirling, swivet, tension, thrill of fear, tizzy, to-do, trepidation, trepidity, trouble, tumult, tumultuation, turbidity, turbulence, turmoil, twitter, unassuredness, unease, uneasiness, unquietness, unrest, unsettlement, unsymmetry, ununiformity, uproar, upset, vexation, vortex, whipping up, whirl, working up, yeastiness, zeal

ROGET THESAURUS

perturbation

Derangement

N derangement, disorder, evection, discomposure, disturbance, disorganization, deorganization, dislocation, perturbation, interruption, shuffling, inversion, corrugation, involvement, interchange, deranged, syncretic, syncretistic, mussy, messy, flaky, random, unordered.

Feeling

N feeling, suffering, endurance, tolerance, sufferance, supportance, experience, response, sympathy, impression, inspiration, affection, sensation, emotion, pathos, deep sense, warmth, glow, unction, gusto, vehemence, fervor, fervency, heartiness, cordiality, earnestness, eagerness, empressement, gush, ardor, zeal, passion, enthusiasm, verve, furore, fanaticism, excitation of feeling, fullness of the heart, passion, ecstasy, blush, suffusion, flush, hectic, tingling, thrill, turn, shock, agitation, quiver, heaving, flutter, flurry, fluster, twitter, tremor, throb, throbbing, pulsation, palpitation, panting, trepidation, perturbation, ruffle, hurry of spirits, pother, stew, ferment, state of excitement, feeling, sentient, sensuous, sensorial, sensory, emotive, emotional, of feeling, with feeling, warm, quick, lively, smart, strong, sharp, acute, cutting, piercing, incisive, keen, keen as a razor, trenchant, pungent, racy, piquant, poignant, caustic, impressive, deep, profound, indelible, deep felt, home felt, heartfelt, swelling, soul-stirring, deep-mouthed, heart-expanding, electric, thrilling, rapturous, ecstatic, earnest, wistful, eager, breathless, fervent, fervid, gushing, passionate, warm-hearted, hearty, cordial, sincere, zealous, enthusiastic, glowing, ardent, burning, red-hot, fiery, flaming, boiling over, pervading, penetrating, absorbing, rabid, raving, feverish, fanatical, hysterical, impetuous, impressed with, moved with, touched with, affected with, penetrated with, seized with, imbued with, devoured by, wrought up, struck all of a heap, rapt, in a quiver, enraptured, heart and soul, from the bottom of one's heart, ab imo pectore, at heart, con amore, heartily, devoutly, over head and ears, head over heels, the heart big, the heart full, the heart swelling, the heart beating, the heart pulsating, the heart throbbing, the heart thumping, the heart beating high, the heart melting, the heart overflowing, the heart bursting, the heart breaking, the heart goes out, a heart as big as all outdoors (sympathy).

Excitation

N excitation of feeling, mental excitement, suscitation, galvanism, stimulation, piquance, piquancy, provocation, inspiration, calling forth, infection, animation, agitation, perturbation, subjugation, fascination, intoxication, enravishment, entrancement, pressure, tension, high pressure, unction, impressiveness, trail of temper, casus belli, irritation, passion, thrill, repression of feeling, sensationalism, yellow journalism, excited, wrought up, up the qui vive, astir, sparkling, in a quiver, in a fever, in a ferment, in a blaze, in a state of excitement, in hysterics, black in the face, overwrought, tense, taught, on a razor's edge, hot, red-hot, flushed, feverish, all of a twitter, in a pucker, with quivering lips, with tears in one's eyes, flaming, boiling over, ebullient, seething, foaming at the mouth, fuming, raging, carried away by passion, wild, raving, frantic, mad, distracted, beside oneself, out of one's wits, ready to burst, bouleverse, demoniacal, lost, eperdu, tempest-tossed, haggard, ready to sink, stung to the quick, up, on one's high ropes, exciting, absorbing, riveting, distracting, impressive, warm, glowing, fervid, swelling, imposing, spirit-stirring, thrilling, high-wrought, soul-stirring, soul-subduing, heart-stirring, heart- swelling, heart-thrilling, agonizing, telling, sensational, hysterical, overpowering, overwhelming, more than flesh and blood can bear, yellow, piquant, spicy, appetizing, provocative, provoquant, tantalizing, eager to go, anxious to go, chafing at the bit, till one is black in the face, the heart beating high, the heart going pitapat, the heart leaping into one's mouth, the blood being up, the blood boiling in one's veins, the eye glistening, the eyes in a fine frenzy rolling, the head turned, when the going gets tough, the tough get going.

Excitability

N excitability, impetuosity, vehemence, boisterousness, turbulence, impatience, intolerance, nonendurance, irritability, itching, wincing, disquiet, disquietude, restlessness, fidgets, fidgetiness, agitation, trepidation, perturbation, ruffle, hurry, fuss, flurry, fluster, flutter, pother, stew, ferment, whirl, buck fever, hurry-skurry, thrill, state of excitement, fever of excitement, transport, passion, excitement, flush, heat, fever, heat, fire, flame, fume, blood boiling, tumult, effervescence, ebullition, boiling over, whiff, gust, story, tempest, scene, breaking out, burst, fit, paroxysm, explosion, outbreak, outburst, agony, violence, fierceness, rage, fury, furor, furore, desperation, madness, distraction, raving, delirium, phrensy, frenzy, hysterics, intoxication, tearing passion, raging passion, anger, fascination, infatuation, fanaticism, Quixotism, Quixotry, tete montee, excitable, easily excited, in an excitable state, high-strung, irritable, impatient, intolerant, feverish, febrile, hysterical, delirious, mad, moody, maggoty- headed, unquiet, mercurial, electric, galvanic, hasty, hurried, restless, fidgety, fussy, chafing, startlish, mettlesome, high-mettled, skittish, vehement, demonstrative, violent, wild, furious, fierce, fiery, hot-headed, madcap, overzealous, enthusiastic, impassioned, fanatical, rabid, rampant, clamorous, uproarious, turbulent, tempestuous, tumultuary, boisterous, impulsive, impetuous, passionate, uncontrolled, uncontrollable, ungovernable, irrepressible, stanchless, inextinguishable, burning, simmering, volcanic, ready to burst forth, volatile, excited, exciting, Int, pish!, pshaw!, noli me tangere, filled with fury, rapt, inspir'd, maggiore fretta minore atto.

Physical Energy

N energy, physical energy, force, power, 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, 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, strongly, fortiter in re, with telling effect, the steam is up, vires acquirit eundo, the race by vigor not by vaunts is won.

Fear

N fear, timidity, diffidence, want of confidence, apprehensiveness, fearfulness, solicitude, anxiety, care, apprehension, misgiving, feeze, mistrust, suspicion, qualm, hesitation, nervousness, restlessness, inquietude, disquietude, worry, concern, batophobia, heartquake, flutter, trepidation, fear and trembling, perturbation, tremor, quivering, shaking, trembling, throbbing heart, palpitation, ague fit, cold sweat, abject fear, mortal funk, heartsinking, despondency, despair, fright, affright, affrightment, boof alarm, dread, awe, terror, horror, dismay, consternation, panic, scare, stampede (of horses), intimidation, terrorism, reign of terror, bug bear, bugaboo, scarecrow, hobgoblin, nightmare, Gorgon, mormo, ogre, Hurlothrumbo, raw head and bloody bones, fee-faw-fum, bete noire, enfant terrible, alarmist, fearing, frightened, in fear, in a fright, haunted with the fear of, afeard, afraid, fearful, timid, timorous, nervous, diffident, coy, faint- hearted, tremulous, shaky, afraid of one's shadow, apprehensive, restless, fidgety, more frightened than hurt, aghast, awe-stricken, horror-stricken, terror-stricken, panic- stricken, awestruck, awe-stricken, horror-struck, frightened to death, white as a sheet, pale, pale as a ghost, pale as death, pale as ashes, breathless, in hysterics, inspiring fear, alarming, formidable, redoubtable, perilous, portentous, fearful, dread, dreadful, fell, dire, direful, shocking, terrible, terrific, tremendous, horrid, horrible, horrific, ghastly, awful, awe-inspiring, revolting, Gorgonian, in terrorem, Int, angels and ministers of grace defend us!, ante tubam trepidat, horresco referens, one's heart failing one, obstupui steteruntque comae et vox faucibus haesit, a dagger of the mind, expertus metuit, fain would I climb but that I fear to fall, fear is the parent of cruelty, Gorgons and hydras and chimeras dire, omnia tuta timens, our fears do make us traitors.

Agitation

N agitation, stir, tremor, shake, ripple, jog, jolt, jar, jerk, shock, succussion, trepidation, quiver, quaver, dance, jactitation, quassation, shuffling, twitter, flicker, flutter, turbulence, perturbation, commotion, turmoil, disquiet, tumult, tumultuation, hubbub, rout, bustle, fuss, racket, subsultus, staggers, megrims, epilepsy, fits, carphology, chorea, floccillation, the jerks, St. Vitus's dance, tilmus, spasm, throe, throb, palpitation, convulsion, disturbance, chaos, restlessness, ferment, fermentation, ebullition, effervescence, hurly-burly, cahotage, tempest, storm, ground swell, heavy sea, whirlpool, vortex, whirlwind, shaking, agitated tremulous, desultory, subsultory, saltatoric, quasative, shambling, giddy-paced, saltatory, convulsive, unquiet, restless, all of a twitter, by fits and starts, subsultorily, per saltum, hop skip and jump, in convulsions, in fits, tempete dans un verre d'eau.