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

The Australian watchdog's claim, filed to the federal court Wednesday, said the unlimited broadcast size of Telegram channels meant the app must take responsibility for culling harmful material.

— ABC News, ABC News, 30 July 2026
During the 2015-16 season, for instance, Dungeness crabs off the coast of California were infected by a harmful algal bloom of Pseudo-nitzschia, which causes domoic acid poisoning in crabs, fish, birds and marine mammals.

— Susanne Rust Follow, Los Angeles Times, 29 July 2026

Definition of harmful

Adjective

When atmospheric weather conditions in May drove dangerous pollution levels in Texas, environmental officials urged residents to limit driving and in particular to avoid drive-through lines.

— Los Angeles Times, Los Angeles Times, 26 July 2026
An unchecked ego further erodes psychological safety, as dismissing feedback signals that team contributions are unwelcome, creating dangerous blind spots.

— Dr. Samantha Madhosingh, Forbes.com, 26 July 2026

Definition of dangerous

Adjective

Prices reached record highs over the past two years, triggered by adverse weather conditions and poor cocoa harvests that pushed chocolate costs higher and dampened consumer sentiment.

— Lim Hui Jie, CNBC, 27 July 2026
Potential adverse effects identified by the FDA include heart toxicity, infections, pancreatitis, increased or decreased insulin sensitivity, serious immunoresponses, melanoma and death.

— Sara Moniuszko, USA Today, 24 July 2026

Definition of adverse

Adjective

Farther north, storms developing across the northern High Plains could bring damaging winds and hail as a cold front moves through parts of the Dakotas and Montana.

— Brandi D. Addison, USA Today, 29 July 2026
The assemblage turned the damaging caricature into a revolutionary hero, and made Saar a star of the Black Arts movement.

— Jessica Gelt, Los Angeles Times, 28 July 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 2 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

highfalutin

Popular in Grammar & Usage

7 Pairs of Commonly Confused Words

Merriam-Webster’s Great Big List of Words You Love to Hate

Is it 'nerve-racking' or 'nerve-wracking'?

Why does English have so many silent letters?

Your vs. You're: How to Use Them Correctly

Popular in Wordplay

Dutch Treat and French Leave: Eight Place-Based Compounds

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

The Words of the Week - Jul. 31

Even More Bird Names that Sound Like Insults (and Sometimes Are)

Popular

7 Pairs of Commonly Confused Words

Dutch Treat and French Leave: Eight Place-Based Compounds

14 Phobias You Probably Haven't Heard Of

Games & Quizzes