UNSTOPPABLE Synonyms: 44 Similar and Opposite Words

unstoppable

adjective

ˌən-ˈstä-pə-bəl

Definition of unstoppable

as in invincible

incapable of being defeated, overcome, or subdued at this point she's so far ahead in the polls that she's unstoppable

Synonyms & Similar Words

Relevance

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 unstoppable In business and in public life, Ackman comes across as a man riding an unstoppable winning streak. — Jeff John Roberts, Fortune, 20 July 2026 This is what happens when an immovable object (CTU) meets an unstoppable force (CPS’ financial crisis). — The Editorial Board, Chicago Tribune, 20 July 2026 In the end, Spain’s immovable object thwarted Messi’s unstoppable force. — Peter Sblendorio, New York Daily News, 19 July 2026 But if Argentina is the unstoppable force, Spain is the immovable object. — Kevin Baxter, Los Angeles Times, 18 July 2026 See All Example Sentences for unstoppable

Recent Examples of Synonyms for unstoppable

Adjective

However, despite the hype and their high World Series odds, the Dodgers are not invincible.

— Dan Freedman, Forbes.com, 4 Aug. 2026
That summer, the Warriors responded by signing Kevin Durant and morphing from juggernaut to invincible.

— Joseph Dycus, Mercury News, 24 July 2026

Definition of invincible

Adjective

The director has established himself as this century’s preëminent Hollywood filmmaker, the rare working artist whose catalogue is as commercially indomitable as it is critically lauded.

— Brady Brickner-Wood, New Yorker, 22 July 2026
That indomitable will was in full display during the meditative Walk for Peace that Pannakara led earlier this year with an international group of monks and his rescue dog, Aloka, who has become a mascot for the movement.

— Deepa Bharath, Fortune, 17 July 2026

Definition of indomitable

Adjective

Should the Arizona Diamondbacks beat the San Diego Padres later Wednesday evening, their once insurmountable 14-game lead over second place will drop to eight games.

— Ian Miller OutKick, FOXNews.com, 6 Aug. 2026
Ferrand-Prevot won last year with a decisive climb on the Col de la Madeleine, creating an insurmountable gap to her rivals.

— Jessica Hopkins, New York Times, 4 Aug. 2026

Definition of insurmountable

Adjective

The rescue party made its way to New York harbor by train, private car, and then two bicycles shared among the three of them—Frank, Sarah’s husband, on one; Sarah and Billo on the other—when shipyard traffic proved unconquerable by automobile.

— Claire Carusillo, Harpers Magazine, 4 Aug. 2026
The Spurs led for more minutes than the Knicks and built seemingly unconquerable leads.

— Dana O’Neil, CNN Money, 14 June 2026

Definition of unconquerable

Adjective

Google also doesn’t claim that SynthID is invulnerable—the original paper on the technology notes that the watermark is not intended to withstand adversarial attacks.

— ArsTechnica, ArsTechnica, 29 July 2026
For Ross, this gives the character a steadier presence than the standard invulnerable operative often found in genre fiction.

— Matt Emma, USA Today, 29 July 2026

Definition of invulnerable

Adjective

The shell of a good- sized adult abalone is more or less impregnable to most of the kelp forest’s predators, too strong and too thick for penetration.

— Literary Hub, Literary Hub, 29 July 2026
As recidivist would-be escapees, de Boeldieu, Marechal, and Rosenthal are transferred to an impregnable medieval fortress, commanded by Captain von Rauffenstein, now burnt, broken in body, and wearing a neck brace.

— Thomas Doherty, HollywoodReporter, 18 July 2026

Definition of impregnable

Adjective

With a win the Tigers will finish the season 6-0 against the A's and go undefeated in the season series for the first time ever.

— ABC News, ABC News, 2 Aug. 2026
Either way, fans were excited for the return of Brock Lesnar to Minnesota inside Hell in a Cell where Brock Lesnar is undefeated.

— Alfred Konuwa, Forbes.com, 2 Aug. 2026

Definition of undefeated

Browse Nearby Words

unstop

unstoppable

unstopped

See all Nearby Words

Cite this Entry

Style

“Unstoppable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unstoppable. Accessed 10 Aug. 2026.

Copy Citation

Synonyms of unstoppable

adjective

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster on unstoppable

More from Merriam-Webster

Word of the Day

pedagogical

Popular in Grammar & Usage

7 Pairs of Commonly Confused Words

Merriam-Webster’s Great Big List of Words You Love to Hate

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Popular in Wordplay

The Longest Long Words List

It's a Scorcher! Words for the Summer Heat

14 Phobias You Probably Haven't Heard Of

The Words of the Week - Aug. 7

12 Lovely and Unusual Words for the Natural World

Popular

7 Pairs of Commonly Confused Words

The Longest Long Words List

It's a Scorcher! Words for the Summer Heat

Games & Quizzes