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 The influencer — who has over 369,000 followers between her Instagram page and two TikTok accounts — said everyone at the hotel was moved to the second floor, and staff was already taking precaution to prevent potentially hazardous destruction. Zoey Lyttle, PEOPLE, 28 Oct. 2025 All Jamaicans should avoid hazardous activities such as playing in floodwaters and climbing trees. George Solis, NBC news, 28 Oct. 2025 Strong longshore currents can sweep swimmers and surfers into rip currents, piers, jetties and other hazardous areas. Nc Weather Bot, Charlotte Observer, 27 Oct. 2025 The agency has undertaken decades of searching to see if there are any potentially hazardous objects threatening our planet. Elizabeth Howell, Space.com, 27 Oct. 2025 See All Example Sentences for hazardous
Recent Examples of Synonyms for hazardous
Adjective
  • But the succession crisis that her sudden and dangerous illness had brought to the fore would dominate the rest of her long reign.
    Literary Hub, Literary Hub, 4 Nov. 2025
  • Systems can be configured to identify signs of structural weaknesses, gas leaks, and other potentially dangerous stimuli emerging in hazardous areas and send data-rich alerts to operators suggesting a response.
    Atharva Gosavi, Interesting Engineering, 3 Nov. 2025
Adjective
  • Every year, millions of visitors flock to Florida to set sail on a perilous voyage through pirate-laden seas as passengers on Walt Disney World’s beloved Pirates of the Caribbean ride.
    Matt Alderton, USA Today, 31 Oct. 2025
  • China's rise puts the United States in a perilous position because our biotech sector isn't just another industry.
    Sen. Todd Young, MSNBC Newsweek, 30 Oct. 2025
Adjective
  • The right-hander generated a ground ball to get the force out at home in an extremely close call, and the very next pitch was a risky fly out tracked down by Andy Pages (who entered the game after the bases were loaded).
    Gabe Smallson, MSNBC Newsweek, 6 Nov. 2025
  • The seedless doctrine For years, Tangem campaigned against seed phrases as risky and error-prone, arguing that paper or metal backups become a single, theft-prone secret that ordinary people routinely mishandle.
    Wyles Daniel, USA Today, 6 Nov. 2025
Adjective
  • Rule out any more serious conditions.
    RikkiLynn Shields Hannigan, Health, 25 Oct. 2025
  • Springsteen has been open over the years about navigating depression, which began to get serious during his early 30s.
    Jordana Comiter, PEOPLE, 25 Oct. 2025
Adjective
  • Downloads hosted on unfamiliar domains or file-sharing sites should be treated as unsafe.
    Kurt Knutsson, FOXNews.com, 3 Nov. 2025
  • Though unsafe to eat from city waters, oysters are among the most efficient purifying devices, each adult capable of filtering up to fifty gallons a day.
    Ben McGrath, New Yorker, 3 Nov. 2025

Browse Nearby Words

Cite this Entry

“Hazardous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hazardous. Accessed 7 Nov. 2025.

More from Merriam-Webster on hazardous

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!