Word:

Perturbation

Per`tur`ba´tion
n.1.The act of perturbing, or the state of being perturbed; esp., agitation of mind.
2.(Astron.) 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.
Noun1.perturbation - an unhappy and worried mental state; "there was too much anger and disturbance"; "she didn't realize the upset she caused me"
Synonyms: upset, disturbance
2.perturbation - (physics) a secondary influence on a system that causes it to deviate slightly
3.perturbation - activity that is an intrusion or interruption; "he looked around for the source of the disturbance"; "there was a disturbance of neural function"
Synonyms: disturbance
4.perturbation - a disposition that is confused or nervous and upset
Synonyms: fluster
5.perturbation - the act of causing disorder
Synonyms: disruption

PERTURBATION. This is a technical word which signifies disturbance, or infringement of a right. It is usually applied to the disturbance of pews, or seats in a church. In the ecclesiastical courts actions for these disturbances are technically called "suits for perturbation of seat." 1 Phillim. 323. Vide Pew.

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
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Pertinacity
Pertinacy
Pertinate
Pertinately
Pertinence
pertinency
Pertinent
pertinently
Pertly
Pertness
Pertransient
Perturb
Perturbability
Perturbable
Perturbance
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-- Perturbation --
Perturbational
Perturbative
Perturbator
Perturbed
Perturber
perturbing
Pertusaria
Pertusariaceae
Pertusate
Pertuse
Pertusion
Pertussis
Peru
Peruke
peruked
Perula
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