as in caves
a passage that goes under the ground, through a hill, etc.
The train goes through a tunnel in the mountain. The moles dug tunnels in the yard.
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Recent Examples of tunnels
PMCs could enter zones still under Israeli control, clearing them of Hamas’s weapons and tunnels, and then Arab and international forces could operate inside those zones to keep the peace once it is established.
—
Ahmed Fouad Alkhatib, The Atlantic, 4 Nov. 2025
Much of that science happens in the same tunnels in the desert outside of Las Vegas where the government used to conduct nuclear testing.
—NPR, 31 Oct. 2025
Both tunnels share a powerful drive system that can control pressure, velocity, and turbulence levels across their massive cross-sections.
—Kaif Shaikh, Interesting Engineering, 30 Oct. 2025
Bring a headlamp to walk your bike through three 1870s railroad tunnels, each hand-dug by crews armed with little more than picks and shovels.
—Erin Gifford, Outside, 30 Oct. 2025
The United States and Israel say Hamas must complete delivery of the remaining bodies, a process the Hamas says involves digging through rubble and tunnels, aided by Egyptian equipment.
—MSNBC Newsweek, 29 Oct. 2025
Some of the bodies are believed to be in Hamas' network of tunnels running below Gaza.
—Maayan Lubell, USA Today, 28 Oct. 2025
Some growers work around cold weather by keeping veggies in greenhouses, grow tunnels, or cold frames, which offer some frost protection.
—Lauren Landers, Better Homes & Gardens, 28 Oct. 2025
Hidden underneath one of the lower-bowl sections of Bank of America Stadium, just outside one of the venue’s four tunnels to the field, there’s an explanation of how the impossible will become possible.
—Alex Zietlow, Charlotte Observer, 28 Oct. 2025
Ahmed Fouad Alkhatib, The Atlantic, 4 Nov. 2025
Much of that science happens in the same tunnels in the desert outside of Las Vegas where the government used to conduct nuclear testing.
—NPR, 31 Oct. 2025
Both tunnels share a powerful drive system that can control pressure, velocity, and turbulence levels across their massive cross-sections.
—Kaif Shaikh, Interesting Engineering, 30 Oct. 2025
Bring a headlamp to walk your bike through three 1870s railroad tunnels, each hand-dug by crews armed with little more than picks and shovels.
—Erin Gifford, Outside, 30 Oct. 2025
The United States and Israel say Hamas must complete delivery of the remaining bodies, a process the Hamas says involves digging through rubble and tunnels, aided by Egyptian equipment.
—MSNBC Newsweek, 29 Oct. 2025
Some of the bodies are believed to be in Hamas' network of tunnels running below Gaza.
—Maayan Lubell, USA Today, 28 Oct. 2025
Some growers work around cold weather by keeping veggies in greenhouses, grow tunnels, or cold frames, which offer some frost protection.
—Lauren Landers, Better Homes & Gardens, 28 Oct. 2025
Hidden underneath one of the lower-bowl sections of Bank of America Stadium, just outside one of the venue’s four tunnels to the field, there’s an explanation of how the impossible will become possible.
—Alex Zietlow, Charlotte Observer, 28 Oct. 2025
Recent Examples of Synonyms for tunnels
Noun
-
Just one of those caves, known as the Tour Cave, is open to the public.—
Matt Alderton,
USA Today,
31 Oct. 2025
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The caves are easily the Meramec Valley’s biggest draw, but in the fall, half of the appeal is found above the surface of the Earth, when Missouri’s maples, ashes, hickories, and oaks start to change colors.—
Evie Carrick,
Travel + Leisure,
30 Oct. 2025
Noun
-
The town of about 600 sits at the northern foothills of the Smoky Mountains and offers hiking, caverns and Silver Falls, the tallest subterranean cascade in the eastern United States, according to World Atlas.—
Craig Shoup,
Nashville Tennessean,
9 Nov. 2025
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Other locations that inspire quiet immersion include the cenotes of Mexico, where sunlight filters through ancient limestone caverns, and the tranquil waters of Amed, Bali, a favorite of free-divers.—
Vanita Salisbury,
AFAR Media,
6 Nov. 2025
Cite this Entry
“Tunnels.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/tunnels. Accessed 11 Nov. 2025.
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