Center letter: c
Outer letter: a g i k l n
Answers (53):
  cackling
  clacking
  clanking
  lacking
  acacia
  acai
  acing
  alack
  caging
  caking
  call
  calla
  calling
  canal
  cancan
  caning
  canna
  canning
  cilia
  clack
  clan
  clang
  clanging
  clank
  click
  clicking
  cling
  clinging
  clinic
  clinical
  clinician
  clink
  clinking
  glacial
  glancing
  icing
  iliac
  inclining
  kick
  kicking
  knack
  knickknack
  lacing
  lack
  laic
  laical
  lancing
  lick
  licking
  lilac
  niacin
  nick
  nicking