core vs cover

core

noun
  • A hollow cylindrical piece of cardboard around which a web of paper or plastic is wound. 

  • A piece of ferromagnetic material (e.g., soft iron), inside the windings of an electromagnet, that channels the magnetic field. 

  • The bony process which forms the central axis of the horns in many animals. 

  • The set of feasible allocations that cannot be improved upon by a subset (a coalition) of the economy's agents. 

  • A tiny sample of organic material obtained by means of a fine-needle biopsy. 

  • An atomic nucleus plus inner electrons (i.e., an atom, except for its valence electrons). 

  • A deposit paid by the purchaser of a rebuilt part, to be refunded on return of a used, rebuildable part, or the returned rebuildable part itself. 

  • A disorder of sheep caused by worms in the liver. 

  • The portion of a mold that creates an internal cavity within a casting or that makes a hole in or through a casting. 

  • Used to designate the main and most diverse monophyletic group within a clade or taxonomic group. 

  • The anatomical core, muscles which bridge abdomen and thorax. 

  • An individual computer processor, in the sense when several processors (called cores or CPU cores) are plugged together in one single integrated circuit to work as one (called a multi-core processor). 

  • The central part of a protein's structure, consisting mostly of hydrophobic amino acids. 

  • A cylindrical sample of rock or other materials obtained by core drilling. 

  • The heart or inner part of a physical thing. 

  • The most important part of a thing or aggregate of things wherever located and whether of any determinate location at all; the essence. 

  • The central fissile portion of a fission weapon. 

  • The center or inner part of a space or area. 

  • The central part of a fruit, containing the kernels or seeds. 

  • The inner part of a nuclear reactor, in which the nuclear reaction takes place. 

  • A miner's underground working time or shift. 

  • The material between surface materials in a structured composite sandwich material. 

verb
  • To cut or drill through the core of (something). 

  • To remove the core of an apple or other fruit. 

  • To extract a sample with a drill. 

adj
  • Forming the most important or essential part. 

cover

noun
  • An envelope complete with stamps and postmarks etc. 

  • The top sheet of a bed. 

  • A persona maintained by a spy or undercover operative; cover story. 

  • The front and back of a book, magazine, CD package, etc. 

  • A cloth or similar material, often fitted, placed over an item such as a car or sofa or food to protect it from dust, rain, insects, etc. when not being used. 

  • A collection (or family) of subsets of a given set, whose union contains every element of said original set. 

  • Area or situation which screens a person or thing from view. 

  • A solid object, including terrain, that provides protection from enemy fire. 

  • The portion of a slate, tile, or shingle that is hidden by the overlap of the course above. 

  • An insurance contract; coverage by an insurance contract. 

  • A setting at a restaurant table or formal dinner. 

  • A new performance or rerecording of a previously recorded song; a cover version; a cover song. 

  • The distance between reinforcing steel and the exterior of concrete. 

  • A fielding position on the off side, between point and mid off, about 30° forward of square; a fielder in this position. 

  • A cover charge. 

  • In a steam engine, the lap of a slide valve. 

  • A lid. 

  • In commercial law, a buyer’s purchase on the open market of goods similar or identical to the goods contracted for after a seller has breached a contract of sale by failure to deliver the goods contracted for. 

verb
  • To make a cover version of (a song that was originally recorded by another artist). 

  • To defend (mark) a particular player or area. 

  • To discuss thoroughly; to provide coverage of. 

  • To set upon all of, so as to completely conceal. 

  • To be upon all of, so as to completely conceal. 

  • To provide insurance coverage for. 

  • To traverse or put behind a certain distance. 

  • To act as a replacement. 

  • To deal with or include someone or something. 

  • To be enough money for. 

  • To invest (oneself with something); to bring upon (oneself). 

  • To have as an assignment or responsibility. 

  • To protect using an aimed firearm and the threat of firing; or to protect using continuous, heaving fire at or in the direction of the enemy so as to force the enemy to remain in cover; or to threaten using an aimed firearm. 

  • To be over or upon, as to conceal or protect. 

  • To place something over or upon, as to conceal or protect. 

  • To extend over a given period of time or range, to occupy, to stretch over a given area. 

  • To copulate with (said of certain male animals such as dogs and horses). 

  • To protect or control (a piece or square). 

adj
  • Of, pertaining to, or consisting of cover versions. 

  • Of or pertaining to the front cover of a book or magazine. 

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