PERTURBATION Synonyms: 80 Similar and Opposite Words

perturbation

noun

ˌpər-tər-ˈbā-shən

Definition of perturbation

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

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of perturbation In the conscious state, says Miller, such perturbations only briefly affect how the brain behaves. — Veronique Greenwood, Time, 23 Mar. 2026 Rigid wings experienced abrupt destabilization, while passive soft wings without sensing and control struggled to recover from larger flow perturbations. — Etiido Uko march 09, New Atlas, 9 Mar. 2026 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 See All Example Sentences for perturbation

Recent Examples of Synonyms for perturbation

Noun

The White House decision has heightened fears that Ukraine could be left exposed to Moscow's escalating attacks as winter approaches.

— Arkansas Online, Arkansas Online, 18 Oct. 2026
That a self-image forged in the crucible of the fear of being ugly makes women amputate their talents?

— Eugenie Brinkema, ARTnews.com, 17 Oct. 2026

Definition of fear

Noun

Patients complete an online survey covering their skin concerns, history, current routine and goals, which is reviewed by a clinician licensed in their state.

— Kathryn Hopkins, Footwear News, 15 Oct. 2026
YouTube Dividing Lines Drawn The inseparable relationship between YouTube and TV was clear for all to see at MIPCOM Cannes but serious concerns from the latter remain.

— Jesse Whittock, Deadline, 15 Oct. 2026

Definition of concern

Noun

When the line between general unease with not knowing crosses into anxiety that interferes with daily life, people should seek professional help, said Dugas.

— ABC News, ABC News, 17 Oct. 2026
Given Abbey’s anxieties about spending money and fear of not having enough, Stacy plans to use very conservative assumptions for inflation, health costs and average returns when making her projections based on Abbey’s savings today.

— Jeanne Sahadi, CNN Money, 17 Oct. 2026

Definition of anxiety

Noun

Melanie Lawrence, a 68-year-old independent, worries about wells going dry in her area near Willcox, where the groundwater grew so depleted that the land started to crack.

— Hannah Knowles The Washington Post, Arkansas Online, 19 Oct. 2026
In an interview earlier this fall with NPR, Los Angeles County's top voting official, Dean Logan, alluded to those worries.

— Miles Parks, NPR, 19 Oct. 2026

Definition of worry

Noun

When the line between general unease with not knowing crosses into anxiety that interferes with daily life, people should seek professional help, said Dugas.

— ABC News, ABC News, 17 Oct. 2026
Beyond elevated yield levels, the widening spread between French and German benchmark sovereign bonds reflects growing investor unease over France's fiscal trajectory and debt servicing capacity.

— , CNBC, 13 Oct. 2026

Definition of unease

Browse Nearby Words

perturbable

perturbation

perturbed

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“Perturbation.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perturbation. Accessed 21 Oct. 2026.

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Synonyms of perturbation

noun

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