as in caves
a naturally formed underground chamber with an opening to the surface
a cavern with beautiful stalactites
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Recent Examples of caverns
These caverns are considered suitable for hydrogen storage because of their tight sealing properties and structural stability.
—
Sujita Sinha, Interesting Engineering, 27 Apr. 2026
Explore a Cave Niagara Cave in Harmony is one of Midwest's largest limestone caverns, with a nearly 60-foot waterfall.
—Robin Pfeifer, Midwest Living, 23 Apr. 2026
Hard-core adventurers can opt for the Wild Cave Tour, a four-hour exploration that takes you a mile deeper into the bowels of the caverns.
—Kristy Tolley, Travel + Leisure, 14 Apr. 2026
But Hezbollah is known to operate a network of underground tunnels and caverns.
—Lauren Frayer, NPR, 12 Apr. 2026
The caverns boast 4 miles of cave passages, as well as over 400 acres aboveground.
—Madeline Bartos, CBS News, 6 Apr. 2026
Few caverns possess the same cache of fossils as Bender’s Cave, however.
—Andrew Paul, Popular Science, 26 Mar. 2026
For more caves and caverns exploration, check out our guide.
—Tiffany Acosta, AZCentral.com, 19 Mar. 2026
The reserve, which can reach as many as 714 million barrels, is stored in large, high-security underground salt caverns along the gulf coastlines of Louisiana and Texas.
—Max Zahn, ABC News, 16 Mar. 2026
Sujita Sinha, Interesting Engineering, 27 Apr. 2026
Explore a Cave Niagara Cave in Harmony is one of Midwest's largest limestone caverns, with a nearly 60-foot waterfall.
—Robin Pfeifer, Midwest Living, 23 Apr. 2026
Hard-core adventurers can opt for the Wild Cave Tour, a four-hour exploration that takes you a mile deeper into the bowels of the caverns.
—Kristy Tolley, Travel + Leisure, 14 Apr. 2026
But Hezbollah is known to operate a network of underground tunnels and caverns.
—Lauren Frayer, NPR, 12 Apr. 2026
The caverns boast 4 miles of cave passages, as well as over 400 acres aboveground.
—Madeline Bartos, CBS News, 6 Apr. 2026
Few caverns possess the same cache of fossils as Bender’s Cave, however.
—Andrew Paul, Popular Science, 26 Mar. 2026
For more caves and caverns exploration, check out our guide.
—Tiffany Acosta, AZCentral.com, 19 Mar. 2026
The reserve, which can reach as many as 714 million barrels, is stored in large, high-security underground salt caverns along the gulf coastlines of Louisiana and Texas.
—Max Zahn, ABC News, 16 Mar. 2026
Recent Examples of Synonyms for caverns
Noun
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In some sea caves, harbor seals rest in the quiet shade.—
Tribune News Service,
Baltimore Sun,
29 Apr. 2026
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Families can embark on thrilling excursions like whale watching tours or exploring the ice caves of Mendenhall Glacier while in port.—
Jessica Puckett,
Boston Herald,
26 Apr. 2026
Noun
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Highlights include Xi’an’s Terracotta Warriors, the cliffside grottoes of Dunhuang, and a camel ride across the dunes of the Gobi Desert.—
Everett Potter,
Forbes.com,
26 Jan. 2026
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Stay at the Four Seasons Resort Nevis, which partners with Islander Watersports to offer excursions to scuba dive reefs, coral grottoes and shipwrecks just minutes from Pinney’s Beach.—
Adrienne Jordan,
USA Today,
6 Nov. 2025
Cite this Entry
“Caverns.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/caverns. Accessed 1 May. 2026.
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