Thesaurus.com
Dictionary.com
Showing results for unstoppable.
Definitions

unstoppable

[uhn-stop-uh-buhl] / ʌnˈstɒp ə bəl /
ADJECTIVE
irrepressible
Synonyms
STRONGEST
boisterous buoyant ebullient exuberant rebellious uncontrollable unrestrained
WEAK
bubbling bubbly enthusiastic inextinguishable insuppressible rhapsodical unconstrained uncontainable unmanageable unquenchable unrestrainable unruly
Antonyms
STRONGEST
controllable restrained
WEAK
depressed despondent grave
ADJECTIVE
relentless
Synonyms
STRONGEST
determined dogged ferocious fierce harsh implacable inexorable rigorous ruthless single-minded uncompromising unforgiving unrelenting unyielding
WEAK
adamant bound bound and determined dead set on go for broke grim hang in hang-tough hard inflexible inhuman mortal obdurate pitiless remorseless rigid stiff stop-at-nothing strict stringent unappeasable unbending undeviating unflinching vindictive
Antonyms
STRONGEST
compassionate easy flexible gentle irresolute kind lenient merciful mild nice nonviolent peaceful remorseful sympathetic tame tender yielding
WEAK
ending intermittent stopping understanding
ADJECTIVE
relentless
Synonyms
STRONGEST
incessant nonstop persistent punishing sustained tenacious unflagging unrelenting unremitting
WEAK
pertinacious unabated unbroken unfaltering unrelieved
Antonyms
STRONGEST
intermittent relenting surrendering yielding
WEAK
ending kind merciful stopping sympathetic understanding

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“The cooperation is unstoppable, and the president wants it to be more robust,” said Eduardo Guerrero, a leading analyst in Mexico City.

From The Wall Street Journal • Apr. 21, 2026

When the stock market appears unstoppable, it is easy for investors to slip past the thin line without noticing.

From The Wall Street Journal • Apr. 19, 2026

Mitchell has developed his side's attacking game to get his lethal backs on the ball more, but close to the tryline his forwards have remained near unstoppable.

From BBC • Apr. 11, 2026

And those unmoved by humanitarian concerns should think about an unstoppable wave of mass migration that may well be unleashed.

From Salon • Apr. 11, 2026

With his thick armor, his giant claws, and his powerful sound cannon, Crusher truly seemed unstoppable.

From "The Wild Robot Protects" by Peter Brown