Center letter: c
Outer letter: a d g i n t
Answers (50):
  addicting
  dictating
  indicating
  acacia
  acai
  acid
  acidic
  acing
  acting
  addict
  antacid
  antic
  attic
  cacti
  cadging
  caging
  cancan
  candid
  canid
  caning
  canna
  canning
  cant
  cantata
  cantina
  cicada
  citing
  dancing
  dicing
  dicta
  didact
  didactic
  gigantic
  icing
  incant
  incanting
  inciting
  indica
  indicia
  indict
  indicting
  intact
  niacin
  tacit
  tact
  tactic
  tactician
  tannic
  tinct
  titanic