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a dangerous situation
an unsafe situation
a hazardous situation
a risky situation
a scary situation
a serious situation
dangerous precedent
troublesome precedent
perilous precedent
awful precedent
unhealthy precedent
horrible precedent
dangerous levels
unhealthy levels
risky levels
toxic levels
deadly levels
hazardous levels
a dangerous enemy
a powerful enemy
a deadly enemy
a potent enemy
a wicked enemy
a threatening enemy

Synonym Chooser

How is the word dangerous distinct from other similar adjectives?

Some common synonyms of dangerous are hazardous, perilous, precarious, and risky. While all these words mean "bringing or involving the chance of loss or injury," dangerous applies to something that may cause harm or loss unless dealt with carefully.

soldiers on a dangerous mission

When could hazardous be used to replace dangerous?

The meanings of hazardous and dangerous largely overlap; however, hazardous implies great and continuous risk of harm or failure.

claims that smoking is hazardous to your health

When can perilous be used instead of dangerous?

The synonyms perilous and dangerous are sometimes interchangeable, but perilous strongly implies the immediacy of danger.

perilous mountain roads

When might precarious be a better fit than dangerous?

In some situations, the words precarious and dangerous are roughly equivalent. However, precarious suggests both insecurity and uncertainty.

earned a precarious living by gambling

When is it sensible to use risky instead of dangerous?

The words risky and dangerous can be used in similar contexts, but 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 dangerous As one of the foundational poetic texts of Western literature, the story follows Odysseus, King of Ithaca on his dangerous journey home after the Trojan war. Max Goldbart, Deadline, 17 Feb. 2025 To optimize the now 5,500-square-foot layout, Churchill demolished a dangerous secondary stair, freeing the hayloft level to become the generous primary suite, where Hammel extended original timber barn framing with reclaimed sawn softwood beams. Elizabeth Fazzare, Architectural Digest, 17 Feb. 2025 This feeds into Newcastle’s 2-0 advantage which, as another cliche tells us, is the most dangerous lead in football. George Caulkin, The Athletic, 5 Feb. 2025 This amount can weigh down trees and power lines — causing power outages — and make travel dangerous to borderline impossible. Mary Gilbert, CNN, 5 Feb. 2025 See All Example Sentences for dangerous
Recent Examples of Synonyms for dangerous
Adjective
  • Even as the cause of Mr. Grant’s death remains unknown, advocates of prison safety say that the strikes are creating hazardous conditions for inmates and warn that more deaths may occur if the labor dispute is not quickly resolved.
    Jay Root, New York Times, 24 Feb. 2025
  • North Carolina is also experiencing hazardous winter conditions, with an advisory in effect until 10 a.m. EST Friday for areas including Person, Granville, Vance, Warren, and surrounding counties.
    Tom Rogers, Newsweek, 21 Feb. 2025
Adjective
  • Organic farms use natural farming methods to keep the soil, water, and environment free from potentially harmful chemicals.7 Similarities Grass-fed and organic foods share a commitment to natural farming.
    Chelsea Rae Bourgeois, RDN, LD, Health, 24 Feb. 2025
  • Studies have shown that testers can harbor harmful bacteria, including Staphylococcus aureus (a common cause of styes and other infections), E. coli, yeast, and mold.
    Mark Joseph, Newsweek, 24 Feb. 2025
Adjective
  • Global histories, by dint of their ambition, can be risky.
    Foreign Affairs, Foreign Affairs, 25 Feb. 2025
  • Early on, adoption can be risky, but everyone is talking about the technology.
    Chantelle Lee, TIME, 25 Feb. 2025
Adjective
  • According to a new study from the University of Hawai‘i (UH) at Mānoa, plastics are becoming the most prevalent form of pollution in the ocean, which can be detrimental to marine species and their habitat.
    Monica Cull, Discover Magazine, 14 Feb. 2025
  • Losing this momentum will be very detrimental to finding the TRUTH, which is turning out to be a disaster for those involved in running our Government.
    Thomas G. Moukawsher, Newsweek, 12 Feb. 2025
Adjective
  • Traditionally, the defense of entitlement programs has been a very strong issue for Democrats, so this is a perilous choice for the GOP.
    Mark Joseph, Newsweek, 23 Feb. 2025
  • The thematic architecture is lucidly in place in this tale of sons stepping out of the shadows of their fathers to test their mettle in the most perilous of circumstances.
    Charles McNulty, Los Angeles Times, 21 Feb. 2025
Adjective
  • The storms are also known for their strong, damaging winds.
    Tom Rogers, Newsweek, 21 Feb. 2025
  • Storms with damaging winds and flash flooding were the main threats, but there was also the possibility of tornadoes.
    Daniel Amarante, ABC News, 16 Feb. 2025
Adjective
  • For years, though, the independent federal agency took serious enforcement actions, which were spurred by consumer complaints and investigative reports.
    Susan Tompor, USA TODAY, 18 Feb. 2025
  • Monday's crash is the fifth serious aviation incident since late January, including the crash at Ronald Reagan Washington National Airport near Washington, D.C., between an Army Black Hawk helicopter and an American Airlines passenger plane that left 67 dead.
    Josh Hammer, Newsweek, 18 Feb. 2025
Adjective
  • Some such adverse impacts include difficulty driving or with close-up activities like reading, writing, cooking, sewing or fixing things around the house.
    Daryl Austin, USA TODAY, 12 Feb. 2025
  • Sitting for too long can lead to a host of adverse health effects, but taking short movement breaks throughout the day can offset these risks.
    Elizabeth Yuko, Health, 12 Feb. 2025

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Cite this Entry

“Dangerous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/dangerous. Accessed 1 Mar. 2025.

More from Merriam-Webster on dangerous

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