Center letter: c
Outer letter: g i k n o r
Answers (50):
  corking
  crooking
  rocking
  cirri
  cocci
  cock
  cocking
  cocoon
  cocooning
  coin
  coining
  coir
  conic
  conk
  conking
  conning
  cooing
  cook
  cooking
  corgi
  coring
  cork
  corn
  crick
  cricking
  cringing
  croc
  croci
  crock
  crook
  croon
  crooning
  icing
  icon
  iconic
  ionic
  ironic
  kick
  kicking
  knock
  knocking
  nick
  nicking
  nock
  nocking
  ricin
  ricing
  rick
  rock
  rococo