1. (n.) Agitation; confusion; a disturbance in the regular elliptic motion of a heavenly body\.

2. (n.) 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.

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