(Optics) can mean any of radiant intensity, luminous intensity or irradiance
Rigorous or trying character
Savage behavior or nature; barbarity.
Find another word for ferociousness. In this page you can discover 15 synonyms, antonyms, idiomatic expressions, and related words for ferociousness, like: depth, ferocity, fierceness, fury, intensity, pitch, severity, vehemence, vehemency, violence and big.