Center letter: o
Outer letter: i l m n t u
Answers (48):
  multimillion
  into
  intuition
  limo
  lion
  loin
  loll
  loom
  loon
  loot
  lotion
  lotto
  lout
  million
  minion
  moil
  moll
  molt
  mono
  moon
  moonlit
  moot
  motion
  motto
  mount
  mullion
  munition
  mutton
  nonillion
  nonunion
  noon
  notion
  noun
  olio
  omit
  onion
  onto
  toil
  toll
  tomtit
  tool
  toon
  toot
  tout
  tuition
  union
  unmount
  unto