Center letter: o
Outer letter: a b c g i l
Answers (51):
  biological
  aboil
  agog
  aioli
  baobab
  biologic
  blob
  bloc
  blog
  boba
  bocci
  boil
  bola
  boll
  bolo
  boob
  booboo
  boogaloo
  cacao
  calico
  callaloo
  ciao
  cloaca
  clog
  coal
  coca
  cocci
  cocoa
  coil
  cola
  colic
  collab
  cool
  gigolo
  glob
  global
  goal
  googol
  igloo
  illogic
  illogical
  lobo
  local
  loci
  loco
  loggia
  logic
  logical
  logo
  loll
  olio