Thesaurus

ultrahazardous

adjective

Synonyms & Antonyms of ultrahazardous

See the Dictionary Definition 

Learn More About ultrahazardous

Time Traveler for ultrahazardous

Time Traveler

The first known use of ultrahazardous was in 1886

See more words from the same year

Thesaurus Entries Near ultrahazardous

ultrafine

ultrahazardous

ultraheavy

See More Nearby Entries 

Cite this Entry

“Ultrahazardous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ultrahazardous. Accessed 22 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Name That Food

  • a-light
  • Name these cookies!
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

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