OVERACTIVE Synonyms: 48 Similar and Opposite Words

overactive

adjective

ˌō-vər-ˈak-tiv

Definition of overactive

as in heated

being in a state of increased activity or agitation the boy manages to panic himself by his own overactive imagination

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Example Sentences

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 overactive Consuming superpotent thyroid tablets can cause an overactive thyroid and issues like weight loss, heat intolerance, fatigue and hypertension, according to the notice. — Melina Khan, USA Today, 25 Aug. 2026 In both conditions, key immune cells, primarily T and B cells, become overactive and attack healthy tissues rather than protecting the body from pathogens. — Lana Barhum, Verywell Health, 22 Aug. 2026 People with atopic dermatitis also have an overactive immune system, which can trigger inflammation. — Ayren Jackson-Cannady, Allure, 20 Aug. 2026 Psoriasis is a chronic disease in which the immune system becomes overactive, causing inflamed, scaly patches of skin. — Grace Gavilanes, PEOPLE, 18 Aug. 2026 See All Example Sentences for overactive

Recent Examples of Synonyms for overactive

Adjective

What really sets the villas apart are the outdoor spaces, which include a large private terrace with a heated pool, sun loungers, an outdoor shower, as well as dining and sitting areas.

— Condé Nast, Condé Nast Traveler, 6 Oct. 2026
Offering easy installation, this bidet with a no-frills interface has some relaxing perks (including a heated water option) without too many extra knobs and levers.

— Audrey Lee, Architectural Digest, 6 Oct. 2026

Definition of heated

Adjective

More than 80% of Chinese felt excited about AI applications, KPMG reported last year; only half that percentage of Americans felt the same.

— Arkansas Online, Arkansas Online, 3 Oct. 2026
Many studies have found that children get excited about getting their own books in the mail, addressed to them personally.

— Alex H. Poole, The Conversation, 2 Oct. 2026

Definition of excited

Adjective

Altercations between agitated people with dementia and other residents or workers charged with caring for them are disturbingly common in long-term care facilities and private homes.

— Jordan Rau, NPR, 30 Sep. 2026
Migratory birds in captivity develop Zugunruhe, an agitated fitfulness, at certain times of year.

— Rivka Galchen, New Yorker, 14 Sep. 2026

Definition of agitated

Adjective

Jo, raised by her grandmother, is hyperactive, wild, free-spirited, and a talented artist but often acts out in school.

— Parents, Parents, 25 Sep. 2026
Finally, there was the matter of Pollak himself, whose hyperactive social posts could come across as cringe, leaving many, including some inside Coinbase, to see him as high on his own supply.

— Jeff John Roberts, Fortune, 20 July 2026

Definition of hyperactive

Browse Nearby Words

overacting

overactive

overacts

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“Overactive.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/overactive. Accessed 9 Oct. 2026.

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Synonyms of overactive

adjective

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