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

And users can report inaccurate, toxic or harmful content by clicking the thumbs down icon shown at the bottom of the response.

— Robin Brewer, The Conversation, 26 Oct. 2026
Mark Zuckerberg spent years overriding the warnings and requests of his own investors to reduce or eliminate the harmful and addictive content leading to immense public harm.

— Andrew Behar, Fortune, 26 Oct. 2026

Definition of harmful

Adjective

People talking to an AI in an abusive and cruel way are more likely to be associated with trying to get the AI model to engage in dangerous requests, like trying to get around an AI’s safety guardrails, Campbell added.

— Hadas Gold, CNN Money, 1 Nov. 2026
Hazing involves requiring new or potential recruits to the military or college fraternities to perform strenuous, humiliating or dangerous tasks.

— Natasha Holt, FOXNews.com, 1 Nov. 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

Floodplain alterations cannot have adverse upstream or downstream effects, and earthen flood barriers, or any other interruption to the natural flow of flood water, is prohibited.

— Matthew Adams, Fort Worth Star-Telegram, 30 Oct. 2026
Studies have found oil wells can emit carcinogens and are linked to adverse health effects including respiratory issues, headaches, throat irritation and other problems.

— Los Angeles Times, Los Angeles Times, 28 Oct. 2026

Definition of adverse

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 4 Nov. 2026.

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Synonyms of nocuous

adjective

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