Center letter: o
Outer letter: a c g i l z
Answers (33):
  zoological
  agog
  aioli
  cacao
  calico
  callaloo
  ciao
  cloaca
  clog
  coal
  coca
  cocci
  cocoa
  coil
  cola
  colic
  cool
  gigolo
  goal
  googol
  igloo
  illogic
  illogical
  local
  loci
  loco
  loggia
  logic
  logical
  logo
  loll
  olio
  zoologic