contrast vs invaginate

contrast

verb
  • To form a contrast. 

  • To set in opposition in order to show the difference or differences between. 

noun
  • Something that is opposite of or strikingly different from something else. 

  • A control on a television, etc, that adjusts the amount of contrast in the images being displayed. 

  • Antithesis. 

  • is a substance used to increase the contrast of structures or fluids within the body in medical imaging. 

  • The degree of this difference. 

  • A difference between two objects, people or concepts. 

invaginate

verb
  • To turn or fold inwardly. 

  • To fold inward to create a hollow space where none had existed, as with a gastrula forming from a blastula. 

  • To fold up or enclose into a sheath-like or pouch-like structure, either naturally or as part of a surgical procedure. 

adj
  • Having one portion of a hollow organ drawn back within another portion. 

  • sheathed 

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