fiber vs smoothness

fiber

noun
  • Moral strength and resolve. 

  • A material whose length is at least 1000 times its width. 

  • A material in the form of fibers. 

  • A long tubular cell found in bodily tissue. 

  • The pullback of a morphism along a global element (called the fiber of the morphism over the global element). 

  • A kind of lightweight thread of execution. 

  • Dietary fiber. 

  • The preimage of a given point in the range of a map. 

  • A single elongated piece of a given material, roughly round in cross-section, often twisted with other fibers to form thread. 

smoothness

noun
  • The condition of being smooth; the degree or measure of said condition. 

  • The highest order of derivative (the differentiability class) over a given domain. 

  • The quantity measured by the modulus of smoothness. 

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