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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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 Thus, people who have overactive versions of PCSK9 have fewer LDL receptors and higher LDL levels in their blood. — Beth Mole, ArsTechnica, 28 May 2026 Sepsis is considered a life-threatening medical emergency that occurs when the body has an extreme, overactive response to an infection, causing the immune system to damage its own tissues and organs, according to the Centers for Disease Control and Prevention. — Steve Reed, Los Angeles Times, 23 May 2026 Studies show the drug works by affecting brain chemicals such as glutamate and dopamine to help calm the overactive signals in the brain linked to agitation. — Dr. Jennifer Miao, ABC News, 1 May 2026 Red or Dark Skin With an overactive thyroid, your circulation increases. — Brandi Jones, Health, 28 Apr. 2026 See All Example Sentences for overactive

Recent Examples of Synonyms for overactive

Adjective

But after choosing to skip the team’s upcoming July 23 White House visit celebrating their 2026 World Series title, the utility veteran found himself at the center of a heated political debate.

— Alejandro Avila OutKick, FOXNews.com, 21 July 2026
The rivalry between New York and Florida — and California and Florida, too — has also become heated as the wealthy have publicly criticized blue states and announced their decisions to relocate.

— Jacqui Palumbo, CNN Money, 21 July 2026

Definition of heated

Adjective

This is because patients are increasingly excited to use wearables and other devices to gather more information and metrics regarding their own health.

— Forbes.com, Forbes.com, 1 Aug. 2026
These very same donors, Eustis said, are the ones who feel most excited to be sitting among the citizenry in Central Park, watching the beauty of public art unfold in a joyous communal atmosphere.

— Jessica Gelt, Los Angeles Times, 31 July 2026

Definition of excited

Adjective

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
Your hyperactive dog catches the scent of a deer and, powered by his hunter's instinct, disappears in the forest.

— Tereza Pultarova, Space.com, 11 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 2 Aug. 2026.

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Synonyms of overactive

adjective

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