I couldn't help but wonder if c10r was an abbreviation (is there a name for this form of shortening?):

  % grep '^c..........r$' /usr/share/dict/words
  cabinetmaker
  calligrapher
  carpetbagger
  cartographer
  cheeseburger
  chiropractor
  collaborator
  commissioner
  communicator
  confectioner
  conquistador
  counteroffer
  countertenor