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
Musk’s Boring Company in July announced plans to build 20 miles of tunnels underneath existing highways to transport people between Nashville International Airport and downtown’s lower Broadway in about 10 minutes.
—
Marco Quiroz-Gutierrez, Fortune, 28 Mar. 2026
Breaching the tunnels Once the perimeter is secure, the commandos would attempt to breach the fortified tunnels that lead to the uranium stockpiles.
—Sheena Samu, CBS News, 27 Mar. 2026
The route winds through 36 tunnels, including the historic Moffat Tunnel, before reaching the ski slopes.
—Sponsored Content, Denver Post, 27 Mar. 2026
Five limestone peaks house a network of tunnels, temples and caves built by Nguyen Dynasty Kings.
—Tamara Hinson, Condé Nast Traveler, 27 Mar. 2026
Those who supported The Boring Company in public hearings praised Music City Loop’s potential to create construction jobs in the city, and hoped the tunnels would alleviate traffic congestion in Nashville.
—Lora Kolodny, CNBC, 26 Mar. 2026
Why is Elon Musk digging tunnels?
—Nicole Fallert, USA Today, 25 Mar. 2026
Between 2002 and 2022, a £360 million project connected the Faroe Islands through a series of undersea tunnels.
—The Week Uk, TheWeek, 20 Mar. 2026
In his video, Lisi was set on finding potential tunnels under Epstein’s island.
—Bruna Horvath, NBC news, 18 Mar. 2026
Marco Quiroz-Gutierrez, Fortune, 28 Mar. 2026
Breaching the tunnels Once the perimeter is secure, the commandos would attempt to breach the fortified tunnels that lead to the uranium stockpiles.
—Sheena Samu, CBS News, 27 Mar. 2026
The route winds through 36 tunnels, including the historic Moffat Tunnel, before reaching the ski slopes.
—Sponsored Content, Denver Post, 27 Mar. 2026
Five limestone peaks house a network of tunnels, temples and caves built by Nguyen Dynasty Kings.
—Tamara Hinson, Condé Nast Traveler, 27 Mar. 2026
Those who supported The Boring Company in public hearings praised Music City Loop’s potential to create construction jobs in the city, and hoped the tunnels would alleviate traffic congestion in Nashville.
—Lora Kolodny, CNBC, 26 Mar. 2026
Why is Elon Musk digging tunnels?
—Nicole Fallert, USA Today, 25 Mar. 2026
Between 2002 and 2022, a £360 million project connected the Faroe Islands through a series of undersea tunnels.
—The Week Uk, TheWeek, 20 Mar. 2026
In his video, Lisi was set on finding potential tunnels under Epstein’s island.
—Bruna Horvath, NBC news, 18 Mar. 2026
Recent Examples of Synonyms for tunnels
Noun
-
Theron races through the forest and rafts through the rapids while Egerton follows her into caves and down the side of a cliff.—
Arushi Jacob,
Variety,
25 Mar. 2026
-
Researchers have discovered multiple rare and new species in previously unexplored caves in Cambodia, including a flying snake and a florescent-turquoise pit viper.—
Emily Mae Czachor,
CBS News,
24 Mar. 2026
Noun
-
There could be more caverns beyond.—
Nicole Young,
CBS News,
29 Mar. 2026
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Few caverns possess the same cache of fossils as Bender’s Cave, however.—
Andrew Paul,
Popular Science,
26 Mar. 2026
Cite this Entry
“Tunnels.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/tunnels. Accessed 1 Apr. 2026.
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