asperity vs elasticity

asperity

noun
  • The quality of being harsh or severe in the way one speaks or behaves toward people. 

  • An area that protrudes from a surface. 

  • A section of a fault line with high friction, such that there is no movement along this part of the fault except during an earthquake. 

  • The quality of being difficult or unpleasant to experience. 

  • The quality of having a rough or uneven surface. 

  • Something that is harsh and difficult to endure. 

elasticity

noun
  • The sensitivity of changes in a quantity with respect to changes in another quantity. 

  • A measure of the flexibility of a data store's data model and clustering capabilities. 

  • The ratio of the relative change in a function's output with respect to the relative change in its input, for infinitesimal changes at a certain point. 

  • The property by virtue of which a material deformed under load can regain its original dimensions when unloaded 

  • A system's ability to adapt to changes in workload by automatically provisioning and de-provisioning resources. 

  • Adaptability. 

  • The quality of being elastic. 

How often have the words asperity and elasticity occurred in a corpus of books? (source: Google Ngram Viewer )