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Softness :: Softness (n.) The quality or state of being soft; -- opposed to hardness, and used in the various specific senses of the adjective..

Adamant :: Adamant (n.) A stone imagined by some to be of impenetrable hardness; a name given to the diamond and other substances of extreme hardness; but in modern mineralogy it has no technical signification. It is now a rhetorical or poetical name for the embodiment of impenetrable hardness.

Crustiness :: Crustiness (n.) The state or quality of having crust or being like crust; hardness.

Chill :: Chill (v. t.) To produce, by sudden cooling, a change of crystallization at or near the surface of, so as to increase the hardness; said of cast iron..

Tungsten :: Tungsten (n.) A rare element of the chromium group found in certain minerals, as wolfram and scheelite, and isolated as a heavy steel-gray metal which is very hard and infusible. It has both acid and basic properties. When alloyed in small quantities with steel, it greatly increases its hardness. Symbol W (Wolframium). Atomic weight, 183.6. Specific gravity, 18..

Diamond :: Diamond (n.) A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness..

Iron :: Iron (n.) Like iron in hardness, strength, impenetrability, power of endurance, insensibility, etc.;.

Petrifaction :: Petrifaction (n.) The process of petrifying, or changing into stone; conversion of any organic matter (animal or vegetable) into stone, or a substance of stony hardness..

Phosphor-bronze :: Phosphor-bronze (n.) A variety of bronze possessing great hardness, elasticity, and toughness, obtained by melting copper with tin phosphide. It contains one or two per cent of phosphorus and from five to fifteen per cent of tin..

Carbuncle :: Carbuncle (n.) A very painful acute local inflammation of the subcutaneous tissue, esp. of the trunk or back of the neck, characterized by brawny hardness of the affected parts, sloughing of the skin and deeper tissues, and marked constitutional depression. It differs from a boil in size, tendency to spread, and the absence of a central core, and is frequently fatal. It is also called anthrax..

Stern :: Stern (superl.) Having a certain hardness or severity of nature, manner, or aspect; hard; severe; rigid; rigorous; austere; fixed; unchanging; unrelenting; hence, serious; resolute; harsh; as, a sternresolve; a stern necessity; a stern heart; a stern gaze; a stern decree..

Steel :: Steel (n.) Fig.: Anything of extreme hardness; that which is characterized by sternness or rigor.

Hardness :: Hardness (n.) The quality or state of being hard, literally or figuratively..

Opal :: Opal (n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity..

Petrifaction :: Petrifaction (n.) Fig.: Hardness; callousness; obduracy.

Stearolic :: Stearin (n.) One of the constituents of animal fats and also of some vegetable fats, as the butter of cacao. It is especially characterized by its solidity, so that when present in considerable quantity it materially increases the hardness, or raises the melting point, of the fat, as in mutton tallow. Chemically, it is a compound of glyceryl with three molecules of stearic acid, and hence is technically called tristearin, or glyceryl tristearate..

Brassy :: Brassy (a.) Of or pertaining to brass; having the nature, appearance, or hardness, of brass..

Durity :: Durity (n.) Hardness; firmness.

Rigor :: Rigor (n.) The becoming stiff or rigid; the state of being rigid; rigidity; stiffness; hardness.

Obduration :: Obduration (n.) A hardening of the heart; hardness of heart.

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