MOUNTAINOUS Synonyms: 123 Similar and Opposite Words

mountainous

adjective

ˈmau̇n-tə-nəs

Definition of mountainous

as in vast

unusually large the seemingly mountainous obstacles he had to overcome while growing up

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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 mountainous Meteorites come down all around the planet, but Antarctica’s blue-ice areas, which comprise about 1% of Antarctica’s surface ice, often in mountainous regions, are among the best places to look. — Daniella McCahey, The Conversation, 12 Oct. 2026 Jean Massillon, who became a prominent voice against gang violence after his mountainous enclave became a battleground in Haiti’s raging violence, has died, the country’s central government announced on Friday. — Jacqueline Charles, Miami Herald, 10 Oct. 2026 The hotel itself is perched on the edge of the mountainous Arashiyama forest, a verdant expanse with a profound, serene quiet that seems to wrap around the entire property. — Noah Kaufman, Bon Appetit Magazine, 7 Oct. 2026 Two weeks into fighting, the unforgiving mountainous terrain, heavy Saudi and government air power, and a reenergized anti-Houthi coalition have kept the Houthi advance in check, preventing a collapse on the level of that in mid-September. — Brady Knox, The Washington Examiner, 4 Oct. 2026 See All Example Sentences for mountainous

Recent Examples of Synonyms for mountainous

Adjective

Deep-sea mining companies are targeting this vast reserves of metal-rich nodules to power the electric vehicle market.

— Mrigakshi Dixit, Interesting Engineering, 14 Oct. 2026
China has stepped up cooperation with Southeast Asian nations to crack down on a vast industry that has flourished in the region in recent years to fleece people out of billions of dollars.

— CBS News, CBS News, 13 Oct. 2026

Definition of vast

Adjective

The account has more than 13 million followers, giving whoever controlled it access to a huge audience and the credibility that comes with Microsoft’s name.

— Kurt Knutsson, FOXNews.com, 11 Oct. 2026
For a family living in poverty, having a home can make a huge difference in the fight for survival.

— Kamala Thiagarajan, NPR, 11 Oct. 2026

Definition of huge

Adjective

The Board leverages the visual engagement potential of a gigantic iPad with the appealing tactility of board games.

— Kevin Cortez, Time, 15 Oct. 2026
M'Baku is the leader of the Jabari tribe, a Wakandan community that worships a gigantic white gorilla deity.

— Sohini Sarah Pillai, The Conversation, 14 Oct. 2026

Definition of gigantic

Adjective

First developed in the 1950s, this aircraft has an enormous weapon payload capacity and intercontinental range.

— Christopher McFadden, Interesting Engineering, 11 Oct. 2026
On top of store closures and unsold inventory, the company was choking on enormous debt from a private equity buyout in 2014.

— Phil Wahba, Fortune, 10 Oct. 2026

Definition of enormous

Adjective

The most direct tribute to Tippett came in the battle against two giant droids guarding an overlord’s chamber.

— Davide Abbatescianni, Variety, 16 Oct. 2026
The giant company now called Skydance Media made some commitments to the indie film space in a settlement with a group of Attorneys General who had sued to block the merger.

— Jill Goldsmith, Deadline, 15 Oct. 2026

Definition of giant

Adjective

Throw in a third massive object, though, and the math gets ridiculously more complicated and difficult to solve.

— Phil Plait, Scientific American, 16 Oct. 2026
Wearing impractical stilettos and clutching a massive Stanley cup, Trina is introduced to her new pupils.

— Aramide Tinubu, Variety, 15 Oct. 2026

Definition of massive

Adjective

Last-minute changes and unscheduled requests to cover other clients can place tremendous stress on the field caregiver.

— Colin Conner II, Forbes.com, 16 Oct. 2026
There has been a tremendous amount of recent development in Chelsea, but, ever the story in New York City, as beloved old places close their doors, new favorites emerge.

— The New Yorker, New Yorker, 16 Oct. 2026

Definition of tremendous

Adjective

The situation is particularly dire given the film’s colossal budget, which totaled around $180 million.

— Lou Gomis, Vanity Fair, 14 Oct. 2026
The Vikings avoided a colossal mistake in the fourth quarter when Justin Jefferson's throwback near midfield was nearly swiped by the Saints.

— CBS News, CBS News, 13 Oct. 2026