Ferocity

[Sarah]

Savage wildness or fierceness; fury; cruelty; as, ferocity ofcountenance.The pride and ferocity of a Highland chief. Macaulay.

[Sarah]

1. the quality or state of being ferocious; fierceness.
2. fierce, ravenous, relentless.
3. one's level of ferociousness.

[Sarah]

Adjective/Noun
Fero-City, as in a city of ferocity. Used to describe something overwhelmingly ferocious (savagely fierce) in every direction and dimension. Often used when 'fierce' just won't cut it.
May also be used as a noun (see examples)

[Ernesto]

The state or quality of being ferocious.