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Definitions for Hardness:

The Collaborative International Dictionary of English v.0.48 :
Hardness \Hard"ness\, n. [AS. heardness.] 1. The quality or state of being hard, literally or figuratively. [1913 Webster] The habit of authority also had given his manners some peremptory hardness. --Sir W. Scott. [1913 Webster] 2. (Min.) The cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched; -- measured among minerals on a scale of which diamond and talc form the extremes. [1913 Webster] 3. (Chem.) The peculiar quality exhibited by water which has mineral salts dissolved in it. Such water forms an insoluble compound with soap, and is hence unfit for washing purposes. [1913 Webster] Note: This quality is caused by the presence of calcium carbonate, causing temporary hardness which can be removed by boiling, or by calcium sulphate, causing permanent hardness which can not be so removed, but may be improved by the addition of sodium carbonate. [1913 Webster]

WordNet (r) 2.0 :
hardness n 1: the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale [ant: softness] 2: devoid of passion or feeling [syn: unfeelingness, callousness, insensibility] 3: the quality of being difficult to do; "he assigned a series of problems of increasing hardness" 4: excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp" [syn: severity, harshness, rigor, rigour, inclemency, stiffness]

Moby Thesaurus II by Grady Ward, 1.0 :
158 Moby Thesaurus words for "hardness": Philistinism, abstruseness, arduousness, armor, asperity, astringency, austerity, bothersomeness, burdensomeness, callosity, callousness, callus, closeness, cohesiveness, coldbloodedness, coldheartedness, coldness, compactness, complexity, complication, congestedness, congestion, consistence, consistency, crabbedness, crampedness, crowdedness, cruelty, deepness, denseness, density, difficultness, difficulty, durability, esoterica, firmness, flintiness, formidable defenses, fundamentalism, gluiness, grimness, hairiness, hard heart, hard shell, hardenedness, hardheartedness, hardiness, hardness of heart, hardship, harshness, heart of stone, heartlessness, impenetrability, impenitence, impenitentness, impermeability, imperviousness, impliability, imporosity, inclemency, incompressibility, induration, inexorability, inexorableness, inflexibility, infrangibility, insensitiveness, insensitivity, insolence, intricacy, inuredness, irrepentance, jammedness, knottiness, laboriousness, lastingness, leatherlikeness, mercilessness, nonrepentance, obduracy, obdurateness, obstinacy, onerousness, oppressiveness, orthodoxy, pitilessness, precisianism, profoundness, profundity, purism, puritanism, reconditeness, relative density, relentlessness, remorselessness, resistance, rhinoceros hide, rigidity, rigidness, rigor, rigorousness, ropiness, roughness, ruggedness, ruthlessness, seared conscience, severity, short shrift, solidity, solidness, soundness, specific gravity, spissitude, stability, stamina, staunchness, sternness, stiffness, stoniness, stoutness, strength, strenuousness, stringency, stringiness, stubbornness, sturdiness, temper, tenacity, tender mercies, thick skin, thickness, toilsomeness, toughness, troublesomeness, unabjectness, unbendingness, unbreakability, unbreakableness, uncompassionateness, uncompromisingness, uncontriteness, unfeeling, unfeelingness, unforgivingness, ungentleness, unmercifulness, unnaturalness, unrelentingness, unremorsefulness, unresponsiveness, unsympatheticness, unyieldingness, vicissitude, vigor, viscidity, viscosity, viscousness, vitality

Related Sites

Hardness - Wikipedia, the free encyclopedia
Hardness refers to various properties of matter in the solid phase that give it ... Hardness can be measured on the Mohs scale or various other scales. ...

Hardness
The greater the hardness of the metal, the greater resistance it has to deformation. ... This is the usual type of hardness test, in which a pointed or rounded ...

Hard water - Wikipedia, the free encyclopedia
The simplest way to determine the hardness of water is the lather/froth test: ... The total water 'hardness' (including both Ca2+ and Mg2+ ions) is read as parts ...

hardness: Definition, Synonyms from Answers.com
hardness n. The quality or condition of being hard. ... Britannica Concise Encyclopedia: hardness ... The degree of hardness is relative, different substances ...

Mineral Gallery: Hardness
The Mineral Gallery is a constantly growing database of ... In terms of reliability, hardness is one of the better physical ... Hardness can be tested ...

Mineral Gallery: Hardness
HARDNESS? ... In terms of reliability, hardness is one of the better physical properties for minerals. ... Hardness can be tested through scratching. ...

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