Synonyms of perturbation

perturbation

noun

ˌpər-tər-ˈbā-shən 

as in fear

an uneasy state of mind usually over the possibility of an anticipated misfortune or trouble

in her perturbation she kept calling her son, a freshman, to see if everything was all right at college

Synonyms & Similar Words

• fear
• concern
• anxiety
• worry
• unease
• concernment
• uncertainty
• agitation
• uneasiness
• fearfulness
• disquietude
• nervousness
• apprehension
• disquiet
• solicitude
• tension
• apprehensiveness
• discomfort
• care
• disturbance
• stress
• anxiousness
• sweat
• nervosity
• panic
• desperation
• tremor
• anguish
• agita
• distress
• dread
• doubt
• desperateness
• strain
• consternation
• jitters
• dismay
• discomposure
• vexation
• torment
• alarm
• upset
• angst
• distraction
• incertitude
• jumpiness
• suspense
• presentiment
• compunction
• edginess
• hand-wringing
• franticness
• cold feet
• foreboding
• misgiving
• qualm
• scruple

Antonyms & Near Antonyms

• unconcern
• content
• ease
• peace
• contentment
• quietude
• calm
• calmness
• serenity
• tranquility
• placidity
• relief
• quiet
• easiness
• peacefulness
• consolation
• solace
• comfort
• placidness
• tranquilness
• sereneness

Example Sentences

Recent Examples of perturbation

And yet, the system is so sensitive that a small perturbation, given enough time, can steer its trajectory in a dramatically different direction. — Antonios Mamalakis, The Conversation, 25 Feb. 2026

If no perturbation can interfere with the singularity, then this separation function should always stay small. — Quanta Magazine, 12 Nov. 2025

In the canonical metaphorical example, a butterfly flaps its wings in Brazil, and the cascading sequence of atmospheric perturbations leads to a tornado in Texas. — Dan Garisto, Scientific American, 22 Oct. 2025

By comparing the forward and backward series of operations, the new algorithm can see the effects of this perturbation throughout the molecule and so model the molecule as a whole. — IEEE Spectrum, 21 Oct. 2025