NOCUOUS Synonyms: 90 Similar and Opposite Words

nocuous

adjective

ˈnä-kyə-wəs

Definition of nocuous

as in harmful

causing or capable of causing harm hand washing is one of the easiest ways to help prevent the spread of nocuous germs

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Recent Examples of Synonyms for nocuous

Adjective

Social media giant Meta was hit with a class action lawsuit in Australia on behalf of children and teenagers who allegedly suffered harm over the addictive design features and exposure to harmful content on its platforms Facebook and Instagram.

— Chad de Guzman, Time, 22 Oct. 2026
Their contracts can run hundreds of pages, making harmful terms easy to bury.

— Emma Witman, Fortune, 21 Oct. 2026

Definition of harmful

Adjective

In November 2021, crew members took shelter inside their spacecraft after a Russian anti-satellite weapons test created a dangerous cloud of debris.

— Kurt Knutsson, FOXNews.com, 25 Oct. 2026
In 2015, Chicago’s public health department identified three cases of invasive meningococcal disease, a highly dangerous pathogen that can kill within hours.

— Julie Morita, Time, 25 Oct. 2026

Definition of dangerous

Adjective

The company still faces numerous personal injury claims and a separate federal case involving a group of nationwide school districts that also focus on allegations that apps like Instagram have had detrimental effects on the well being of children.

— Jonathan Vanian, CNBC, 21 Oct. 2026
Often, those firms’ IT heads think those changes are detrimental.

— Scharon Harding, ArsTechnica, 21 Oct. 2026

Definition of detrimental

Adjective

Trump could decide that appearing powerless as Iranian attacks push up prices is more damaging than another round of military strikes.

— Ali Vaez, Time, 21 Oct. 2026
Lycopene can help protect blood vessels from the damaging effects of unstable molecules known as free radicals.

— MD Published, Verywell Health, 17 Oct. 2026

Definition of damaging

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.

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nocturnal

nocuous

nod

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“Nocuous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nocuous. Accessed 27 Oct. 2026.

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Synonyms of nocuous

adjective

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