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 More than 20 million people from Texas to South Dakota and Iowa are under red flag warnings for hazardous fire weather conditions early this week. Robert Shackelford, CNN, 17 Mar. 2025 And 12 miles to the east is a former military waste disposal site, which has been designated as a Superfund site, or one that needs longtime hazardous material cleanup. Cyrus Farivar, Forbes, 17 Mar. 2025 Terahertz waves have been proposed as a powerful tool to quickly transfer giant volumes of data in potential 6G networks and to see through solid matter, like X-rays—only without the hazardous ionizing radiation. IEEE Spectrum, 15 Mar. 2025 If after an inspection a building is determined to be hazardous to pedestrians passing below — such as if its facade is deteriorating — the owner must protect the sidewalk, in a manner approved by the city, until the problem is fixed. Mark Dent, thehustle.co, 14 Mar. 2025 See All Example Sentences for hazardous
Recent Examples of Synonyms for hazardous
Adjective
  • Paved highways meant dangerous going for horse and rider, and her only mishap of the trip would come at Portland, when Goldie slipped on rain-slick pavement and fell on his rider and broke her leg, resulting in a delay of several weeks.
    Ben East, Outdoor Life, 14 Mar. 2025
  • Part of this season’s focus has been on building his partnership with Murphy, whose primary attacking role is to find Isak in dangerous areas, and encouraging his team-mates to involve the striker whenever possible.
    Chris Waugh, The Athletic, 14 Mar. 2025
Adjective
  • From Sailing Ships To The Ocean Liner Before the advent of the ocean liner, transoceanic travel was a perilous endeavor on sailing ships that were at the mercy of the elements.
    David Nikel, Forbes, 16 Mar. 2025
  • The gathering underscored the perilous, uncertain time federal workers across the Kansas City metro – and the country – find themselves in, as Trump moves to gut federal agencies.
    Jonathan Shorman, Kansas City Star, 15 Mar. 2025
Adjective
  • Traditionally, however, penny stocks are pretty risky.
    Kelly Phillips Erb, Forbes, 8 Mar. 2025
  • Forgoing a balanced diet or drastically cutting calories is risky.
    Helen Carefoot, Verywell Health, 7 Mar. 2025
Adjective
  • Bel Air estate Kardashian began dating a new man in 2012, and things between her and Ye got real serious real fast.
    Joyce Chen, Architectural Digest, 13 Mar. 2025
  • The comedy scenes have an energy that’s missing in the more serious sequences, say the clumsily metaphorical shots of George fishing.
    Amy Nicholson, Los Angeles Times, 13 Mar. 2025
Adjective
  • Deeming Starliner unsafe for return, NASA ordered it to fly back empty last September and moved Wilmore and Williams to a SpaceX flight originally scheduled for February.
    Mark Davis, Newsweek, 14 Mar. 2025
  • Alcohol is dehydrating, can negatively impact the immune system, and can be unsafe with cold medications.1 There is no cure for the common cold, but there are better supportive measures than whiskey to help provide relief.
    Amelia MacIntyre, Verywell Health, 14 Mar. 2025

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Cite this Entry

“Hazardous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hazardous. Accessed 23 Mar. 2025.

More from Merriam-Webster on hazardous

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