ferocious

adjective

fe·​ro·​cious fə-ˈrō-shəs 

1

: exhibiting or given to extreme fierceness and unrestrained violence and brutality

a ferocious predator

the ferocious butchery of women and children

2

: extremely intense

ferocious heat

The competition among the students was ferocious.

ferociously adverb

ferociousness noun

Synonyms of ferocious

• intense
• fierce
• intensive
• terrible
• furious
• deep

Choose the Right Synonym for ferocious

fierce, ferocious, barbarous, savage, cruel mean showing fury or malignity in looks or actions.

fierce applies to humans and animals that inspire terror because of their wild and menacing aspect or fury in attack.

fierce warriors

ferocious implies extreme fierceness and unrestrained violence and brutality.

a ferocious dog

barbarous implies a ferocity or mercilessness regarded as unworthy of civilized people.

barbarous treatment of prisoners

savage implies the absence of inhibitions restraining civilized people filled with rage, lust, or other violent passion.

a savage criminal

cruel implies indifference to suffering and even positive pleasure in inflicting it.

the cruel jokes of schoolboys

Examples of ferocious in a Sentence

A ferocious wind swept the beach.

The competition among the students was ferocious.

Recent Examples on the Web

Now, researchers are concerned that more ecosystems will be disrupted as the apex predators with a ferocious appetite feast on a buffet of raccoons, opossums, bobcats, alligators and birds -- including prey bigger than themselves. — Julia Jacobo, ABC News, 11 July 2026

Known for his command of ferocious demon-quelling deities, Zhenwu remains a popular deity in Daoist exorcist rituals in places such as Taiwan. — Michael Naparstek, The Conversation, 6 July 2026

That’s because a parasite called Cyclospora, which can contaminate raw produce and causes ferocious and long-lasting bouts of diarrheal illness, is making people sick across several states. — Brenda Goodman, CNN Money, 3 July 2026

Bryan Marchment was known as one of the NHL’s most ferocious defensemen of his era, and was also described as a caring and compassionate father and friend away from the rink. — Curtis Pashelka, Mercury News, 1 July 2026

Word History

Etymology

Latin feroc-, ferox, literally, fierce looking, from ferus + -oc-, -ox (akin to Greek ōps eye) — more at eye

First Known Use

1646, in the meaning defined at sense 1

Rhymes for ferocious

• atrocious
• precocious

Kids Definition

ferocious

adjective

fe·​ro·​cious fə-ˈrō-shəs 

1

: fierce sense 1, savage

2

: very great : extreme

ferocious heat

ferociously adverb

ferociousness noun

ferocity

fə-ˈräs-ət-ē

noun