This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Having a savage and violent nature; ferocious. See Synonyms at cruel.

adj. Extremely severe or violent; terrible: "the fierce thunders roar me their music” ( Ezra Pound).

adj. Extremely intense or ardent: fierce loyalty. See Synonyms at intense.

adj. Strenuously active or resolute: a fierce attempt to escape.

adj. Informal Very difficult or unpleasant: a fierce exam.

adj. Savage or threatening in appearance.

adj. Extremely violent, severe, ferocious or savage.

adj. Resolute or strenuously active.

adj. Threatening in appearance or demeanor.

adj. very, excellent.

adj. Of exceptional quality, exhibiting boldness or chutzpah.

adj. Furious; violent; unrestrained; impetuous.

adj. Vehement in anger or cruelty; ready or eager to kill or injure; of a nature to inspire terror; ferocious.

adj. Excessively earnest, eager, or ardent.

Wild, as a beast; savage; ferocious; having a cruel or rapacious disposition or intention: as, a fierce lion; a fierce pursuer.

Ferocious in quality or manifestation; indicating or marked by savage cruelty or rage.

Violent; vehement; impetuous; passionate; ardent.

Wild; disordered; dreadful.

Strong; powerful.

Great; large (of number).

Brisk; lively.

Sudden; precipitate.

=Syn. 1–3. Infuriate, fell, fiery, passionate, barbarous, rapacious, ravenous.

adj. ruthless in competition

adj. marked by extreme intensity of emotions or convictions; inclined to react violently; fervid

adj. violently agitated and turbulent

adj. marked by extreme and violent energy

"Grey was at his computer, his expression fierce as his fingers flew over the keyboard."

merciless    unmerciful    intense    stormy    violent   

fell    ferocious    savage    barbarous    vehement    impetuous    cruel    furious    violent    unrestrained   

Bierce    Peirce    Pierce    pierce   

wild    passionate    fiery    powerful    savage    bold