hardness Synonyms - page 2

astringence inclementness insensitivity arduousness durability firmness flintiness formidability grimness immanity immovability impenetrability impenitence difficulty difficultness density asperity austerity callus carbonado compactness consistence consistency cruelness cruelty impermeability implacability precisianism puritanism rasper resistance resistibility rigidity rigidness invulnerability solidity pravity permanence obduracy imporosity impracticability incompressibility induration inelasticity inexorability inflexibility infrangibility irrepentance solidness