Synonym: callosity, callousness, harshness, inclemency, insensibility, rigor, rigorousness, rigour, rigourousness, ruggedness, severeness, severity, stiffness, unfeelingness. Similar words: awkwardness, madness, sadness, kindness, wretchedness, harness, hard-pressed, wednesday. Meaning: ['hɑrdnɪs /'hɑː-] 
n. 1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale 2. devoid of passion or feeling; hardheartedness 3. the quality of being difficult to do 4. excessive sternness.
n. 1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale 2. devoid of passion or feeling; hardheartedness 3. the quality of being difficult to do 4. excessive sternness. 
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31. Among the silicates hardness varies from 1 in talc to 8 in topaz.
32. Some artists prefer the springy sensitivity of an open canvas whilst others prefer the hardness or smoothness of a board.
33. Hardness refers to gluten and protein, which form the cell structure of the dough.
34. Her memory must be lingering in every lonely room and courtyard - hence his hardness now.
35. It hardened him and hardness proved an extremely valuable asset in the ring.
36. Her hand snaked down his pyjamas to feel his hardness ... Then it was morning.
37. She rolled his stiffened cue around her mouth,[http://sentencedict.com/hardness.html] and licked at the hardness like a child savouring a stick of rock.
38. Or did the problem also reside in the hardness of the job itself?
39. Constantly running water through gravel means that any hardness will be leached into the water.
40. Because bond strengths may differ along the various crystallographic axes, hardness may also vary slightly in direction.
41. Even so, he could see something of himself in her; that same hardness in the face of adversity.
42. It also became apparent that a means of removing hardness salts in water was necessary, particularly for steam raising boilers.
43. A considerable amount of sludge comes from lime-soda-softening, the amount increasing with the hardness of the water.
44. Advantages: high hardness, rigid and impact resistance.
45. Beneath Ruth's composure he sensed an uncharacteristic hardness.
46. Heat resistant and extreme hardness Micro-crystal plate.
47. One property of steel is its hardness.
48. It is also treated to regulate alkalinity and hardness.
49. The Vicker's hardness was increased with increasing pass number.
50. So improve autoloading of Rockwell hardness method of measurement.
51. O, hardness to dissemble! - How do you(sentencedict.com), Desdemona?
52. Indentation methods of hardness testing comprise two principal groups.
53. Fine grain grade with high hardness and high toughness.
54. He had slipped from hardness into affability.
55. These trees are noted for their straightness and hardness.
56. This process removes the water hardness.
57. A knid of metallic hardness came into his voice.
58. All transmission shafts are chrome plated to increase hardness.
59. The surface hardness improved greatly after multilayer film deposition.
60. Hardness is caused by divalent metallic cations.
More similar words: awkwardness, madness, sadness, kindness, wretchedness, harness, hard-pressed, wednesday, tactlessness, hard, hardly, orchard, hardware, hard copy, hardly any, hardship, hard and fast, hardly ever, hard knocks, oneness, hardworking, shyness, witness, finesse, fitness, harmless, sickness, awareness, darkness, wellness.