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

Synonyms & Similar Words

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Antonyms & Near Antonyms

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 To give the episodes shape, each is broken up into several mini-narratives, such as a mother cheetah learning to adapt her hunting style to mountainous rocky terrain in order to catch prey for her hungry cubs. — Jennifer Ouellette, ArsTechnica, 4 Oct. 2026 Poppe described seeing one of PG&E’s workers being lowered by rope from a helicopter onto a transmission tower in mountainous California. — Nick Lichtenberg, Fortune, 30 Sep. 2026 The man, whose identity was withheld until his family could be notified, fatally plunged from a mountainous area of Hyrum, Utah, east of Millville Canyon and east of the small city of Millville, Cache County Chief Sheriff’s Deputy Doyle Peck said. — Dennis Romero, NBC news, 28 Sep. 2026 And at the L’Anse-Pleureuse rest area on Route 198, just outside Saint-Maxime-du-Mont-Louis, the view of a lake surrounded by mountainous terrain is well worth a stop. — Maryam Siddiqi, Travel + Leisure, 28 Sep. 2026 See All Example Sentences for mountainous

Recent Examples of Synonyms for mountainous

Adjective

Questions remain over how the Premier League could create competitive balance, given the vast differences in spending ability between its biggest clubs and smaller challengers.

— Jacob Feldman, Sportico.com, 7 Oct. 2026
Halzen had the idea to turn the vast Antarctic ice into such a detector.

— Arkansas Online, Arkansas Online, 7 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

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

Most of the time, Mark just flails, complains, and pouts like a giant baby, and Affleck’s twitchy, rapid-fire delivery can’t give the character any life or depth.

— Bilge Ebiri, Vulture, 8 Oct. 2026
If a crack reaches a giant zucchini’s internal cavity, the zucchini — known as marrow by growers — is disqualified.

— Kyle Melnick, Washington Post, 8 Oct. 2026

Definition of giant

Adjective

On Monday, stand-up comedians on social media launched a massive awareness campaign to pressure one of their own, Sebastian Maniscalco, to reconsider recent programming decisions at his SiriusXM radio station, Sebastian Maniscalco’s Comedy Radio.

— Hershal Pandya, Vulture, 8 Oct. 2026
The whole story unfolds within a massive narrative arc that spans the roughly 20 years of the hunt for the Monster.

— Nick Vivarelli, Variety, 8 Oct. 2026

Definition of massive

Adjective

What is already clear is the tremendous talent across our organization and our shared mission to deepen and extend our fans’ emotional connection to our iconic brands and franchises through high-quality products and stories.

— Todd Spangler, Variety, 9 Oct. 2026
The museum brought a tremendous wow factor that cities around the world were soon clamoring to imitate.

— Robb Report, Robb Report, 9 Oct. 2026

Definition of tremendous

Adjective

The signal, however, is evidence of a colossal magnetic field — not intelligent life.

— Jacopo Prisco, CNN Money, 2 Oct. 2026
The sensational international rescue of the famously sentient creatures, replete with colossal cargo planes, huge crates and Shedd staffers working in the dead of night to transport and care for the whales, must have looked made for social media.

— Arkansas Online, Arkansas Online, 28 Sep. 2026