buckram vs congeal

buckram

verb
  • To stiffen with or as if with buckram. 

noun
  • A coarse cloth of cotton, linen or hemp, stiffened with size or glue, used in bookbinding to cover and protect the books, in garments to keep them in the form intended, and for wrappers to cover merchandise. 

  • A plant, Allium ursinum, also called ramson, wild garlic, or bear garlic. 

congeal

verb
  • To make rigid or immobile. 

  • To change from a liquid to solid state, perhaps due to cold; called to freeze in nontechnical usage. 

  • To become congealed, solidify. 

  • To coagulate, make curdled or semi-solid such as gel or jelly. 

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