The savage deed had been accomplished with frightful ferociousness and strength.
"War and the Weird"
Forbes Phillips R. Thurston Hopkins
It took Sally somewhat aback, this confident ferociousness.
"The Rangeland Avenger"
Max Brand
It was a square-set thing and black and inclined to lumpiness and it had an awkward look about it, but there were strength and ferociousness as well.
"The World That Couldn't Be"
Clifford Donald Simak