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

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for nocuous

Adjective

These spurious claims about childhood vaccines will only increase vaccine hesitation with harmful results.

— Sun Sentinel Editorial Board, Sun Sentinel, 13 Aug. 2026
One reason for this is that peppermint oil has known antimicrobial properties and can destroy harmful microorganisms.

— BestReviews, Chicago Tribune, 13 Aug. 2026

Definition of harmful

Adjective

On Sunday, storms brought dangerous flash flooding to the area around the Aspen Acres burn scar.

— Christa Swanson, CBS News, 17 Aug. 2026
That makes the world a more dangerous place, where a mistake by just one actor could ignite a regional firestorm, with a US military weakened by Iran unable to ensure American security.

— Brad Lendon, CNN Money, 17 Aug. 2026

Definition of dangerous

Adjective

These can be detrimental to a business owner and the success of their businesses.

— Simone Lundquist, Forbes.com, 10 Aug. 2026
Both receptors are common on human airway cells High levels of stimulation are detrimental, the researchers wrote, whereas moderate levels indicating small amounts of time spent in cowsheds seemed to be beneficial.

— Baltimore Sun, Boston Herald, 9 Aug. 2026

Definition of detrimental

Adjective

More damaging, employees gradually learn that raising concerns means navigating the leader's emotional reaction before addressing the actual issue.

— Rodger Dean Duncan, Forbes.com, 13 Aug. 2026
The main threats are expected to be damaging winds, hail and possible tornadoes.

— Michelle Simmons, ABC News, 12 Aug. 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.

Browse Nearby Words

nocturnal

nocuous

nod

See all Nearby Words

Podcast

Cite this Entry

Style

“Nocuous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nocuous. Accessed 17 Aug. 2026.

Copy Citation

Synonyms of nocuous

adjective

Example Sentences

Browse Nearby Words

Podcast

Cite this Entry

More from Merriam-Webster

Word of the Day

lackadaisical

Popular in Grammar & Usage

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

7 Pairs of Commonly Confused Words

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Do you 'say your piece' or 'say your peace'?

Why is '-ed' sometimes pronounced at the end of a word?

Popular in Wordplay

Words from the 'Odyssey'

The Longest Long Words List

It's a Scorcher! Words for the Summer Heat

Is “GIF” Pronounced “Jiff” or “Giff”?

12 Lovely and Unusual Words for the Natural World

Popular

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Words from the 'Odyssey'

The Longest Long Words List

Games & Quizzes