Synonyms of the word

ferocious

• adj. Marked by extreme and violent energy.
• adj. Extreme or intense.

fierce

• adj. Exceedingly violent, severe, ferocious or savage.
• adj. Resolute or strenuously active.
• adj. Threatening in appearance or demeanor.
• adj. (slang, Ireland, rural) Excellent, very good.
• adj. (slang, US) Of exceptional quality, exhibiting boldness or chutzpah.
• adv. (slang, Ireland, rural) Extremely; very.

furious

• adj. Transported with anger or passion; raging; violent.
• adj. Rushing with impetuosity; moving with violence.

savage

• adj. Wild; not cultivated.
• adj. Barbaric; not civilized.
• adj. Fierce and ferocious.
• adj. Brutal, vicious, or merciless.
• adj. (Britain, slang) Unpleasant or unfair.
• n. (pejorative) An uncivilized or feral human; a barbarian.
• n. (figuratively) A defiant person.
• v. To attack or assault someone or something ferociously or without restraint.
• v. (figuratively) To criticise vehemently.
• v. (of an animal) To attack with the teeth.
• v. (obsolete, transitive) To make savage.

violent

• adj. Involving extreme force or motion.
• adj. Involving physical conflict.
• adj. Likely to use physical force.
• adj. Intensely vivid.
• adj. (obsolete) Produced or effected by force; not spontaneous; unnatural.
• v. (transitive, archaic) To urge with violence.
• n. (obsolete) An assailant.