perturbation (n.)
- ado
- aggravation
- agitation
- angst
- animation
- anxiety
- anxiousness
- apprehension
- apprehensiveness
- arousal
- baffle
- bafflement
- befuddlement
- bewilderment
- bluster
- boil
- boiling
- bother
- botheration
- brouhaha
- bustle
- care
- chaos
- churn
- cloud
- commotion
- concern
- confusion
- convulsion
- creeps
- daze
- derangement
- dilemma
- disarrangement
- disarray
- discombobulation
- discomfiture
- discomposure
- disconcertion
- disconcertment
- disharmony
- 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
- ferment
- fermentation
- fever
- feverishness
- fix
- flap
- flurry
- fluster
- flutter
- fog
- fomentation
- foreboding
- frenzy
- fuddle
- fuddlement
- fume
- fuss
- galvanization
- gooseflesh
- haphazardness
- haze
- horripilation
- hubbub
- hurry
- incitement
- incoherence
- inflammation
- infuriation
- inquietude
- insanity
- irregularity
- irritation
- jam
- jitters
- jumble
- jumpiness
- maelstrom
- malaise
- maze
- mess
- misgiving
- mist
- moil
- muddle
- mystery
- nervousness
- nonuniformity
- overanxiety
- palpitation
- perplexity
- pickle
- plight
- pother
- predicament
- problem
- promiscuity
- promiscuousness
- provocation
- pucker
- puzzle
- puzzlement
- quandary
- randomness
- restlessness
- riddle
- roil
- rout
- row
- ruffle
- scrape
- shuffle
- shuffling
- solicitude
- stew
- stimulation
- stimulus
- stir
- stirring
- strain
- suspense
- sweat
- swirl
- swivet
- tension
- tizzy
- to-do
- trepidation
- trepidity
- trouble
- tumult
- turbidity
- turbulence
- turmoil
- unease
- uneasiness
- unrest
- uproar
- upset
- vexation
- vortex
- whirl
- zeal
