Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
harshness [ˈhɑːʃnɪs] n (see adj) ре́зкость f ; жёсткость f ; стро́гость f ; суро́вость f
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: