Synonym Chooser

How is the word hazardous distinct from other similar adjectives?

Some common synonyms of hazardous are dangerous, perilous, precarious, and risky. While all these words mean "bringing or involving the chance of loss or injury," hazardous implies great and continuous risk of harm or failure.

claims that smoking is hazardous to your health

When is dangerous a more appropriate choice than hazardous?

In some situations, the words dangerous and hazardous are roughly equivalent. However, dangerous applies to something that may cause harm or loss unless dealt with carefully.

soldiers on a dangerous mission

When could perilous be used to replace hazardous?

Although the words perilous and hazardous have much in common, perilous strongly implies the immediacy of danger.

perilous mountain roads

In what contexts can precarious take the place of hazardous?

While the synonyms precarious and hazardous are close in meaning, precarious suggests both insecurity and uncertainty.

earned a precarious living by gambling

Where would risky be a reasonable alternative to hazardous?

While in some cases nearly identical to hazardous, risky often applies to a known and accepted danger.

shied away from risky investments

Example Sentences

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 hazardous Separately, dozens of California counties sued Tesla in 2024 over claims of illegally dumping hazardous waste produced at its facility and local service centers. Taylor Kate Brown, ProPublica, 17 Sep. 2025 The National Weather Service (NWS) Indianapolis said there's a hazardous weather outlook for Central Indiana. Jade Jackson, IndyStar, 17 Sep. 2025 Sometimes the pack will follow a lead rider into crowds of pedestrians or in other hazardous behavior such as wheelies or racing. Phil Diehl, San Diego Union-Tribune, 17 Sep. 2025 Any object larger than 492 feet (150 meters) within this distance, is deemed a potentially hazardous object. Rachael O'Connor, MSNBC Newsweek, 16 Sep. 2025 See All Example Sentences for hazardous
Recent Examples of Synonyms for hazardous
Adjective
  • Demonizing or attempting to eliminate those who think differently – literally or symbolically – has become a dangerous norm, which is all too evident in the wake of the Kirk shooting.
    Arash Javanbakht, The Conversation, 15 Sep. 2025
  • During volatile periods, this becomes especially dangerous because customer loyalty becomes more fragile and harder to rebuild.
    Talbott Roche, Forbes.com, 15 Sep. 2025
Adjective
  • These currents vary in speed and can swiftly become perilous for anyone venturing into the surf.
    NC Weather Bot, Charlotte Observer, 15 Sep. 2025
  • Meanwhile, as Hjalmar’s 14-year-old daughter, Hedvig, the elfin Maaike Laanstra-Corn is delivering yet another wonderfully eccentric embodiment of a high-strung tween with a potentially perilous excess of imagination.
    Sara Holdren, Vulture, 14 Sep. 2025
Adjective
  • Instead of following that plan, Artamonov put investor money into risky short-term options, losing millions of dollars, often within days of receiving the money from investors, the indictment said.
    Dave Smith, Fortune, 19 Sep. 2025
  • The party already enjoys largely favorable maps in Maryland and Illinois, making redistricting in either state politically risky for its members and a tougher lift.
    The Hill, The Hill, 18 Sep. 2025
Adjective
  • Serving warrants requires officers to arrest a person suspected of committing a serious crime or secure crucial evidence, both situations that up the chances that a dangerous suspect might be lying in wait.
    N'dea Yancey-Bragg, USA Today, 20 Sep. 2025
  • This lightwear pair at Amazon is on sale for $12—a serious deal considering they’re polarized to ensure UV protection, feature a coating that helps protect against water on rainy days, and have a one-piece nosepad that fits snugly on your face without digging in like some of the metal varieties.
    Lane Nieset, Travel + Leisure, 20 Sep. 2025
Adjective
  • With no hospital in sight and no health workers around, Amani was forced to deliver in unsafe and high-risk conditions.
    Sarah Ferguson, Forbes.com, 15 Sep. 2025
  • In the same way there’s no conclusive data to say chemical sunscreen formulas are inherently more toxic than mineral ones, there’s no conclusive data to say SPF boosters are inherently safe or unsafe.
    Dani Hardman, Allure, 15 Sep. 2025

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Cite this Entry

“Hazardous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hazardous. Accessed 21 Sep. 2025.

More from Merriam-Webster on hazardous

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