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Roughness vs Asperity - What's the difference?

roughness | asperity |

As nouns the difference between roughness and asperity

is that roughness is the property of being rough, coarseness while asperity is roughness as of stone or weather.

roughness

English

(wikipedia roughness)

Noun

  • The property of being rough, coarseness.
    • The roughness of the road made me wonder if my car would fall apart.

    asperity

    English

    Noun

    (asperities)
  • Roughness as of stone or weather.
    • asperity of Maine's winter
  • Harshness, as of temper.
  • * 1878 : :
    • Go, ribald, get you hence
    To your cabin with celerity.
    This is the consequence
    Of ill-advised asperity !
  • Something that is harsh and difficult to endure.
  • (geology) A part of a geological fault line that does not move.
    • Earthquakes begin and end at asperities .