Center letter: c
Outer letter: a f i l n u
Answers (30):
  fanciful
  acacia
  acai
  calculi
  calf
  call
  calla
  canal
  cancan
  canna
  cannula
  caul
  cilia
  clan
  cliff
  clinic
  clinical
  clinician
  cuff
  cull
  facial
  fanfic
  financial
  iliac
  lacuna
  laic
  laical
  lilac
  niacin
  uncuff