Center letter: i
Outer letter: a d l m n o
Answers (65):
  mandolin
  admin
  aioli
  amid
  amino
  ammonia
  amnio
  anima
  animal
  anion
  dial
  diamond
  dildo
  dill
  dino
  domain
  dominion
  domino
  idiom
  idol
  imam
  inlaid
  inland
  laid
  lain
  lamina
  laminal
  lanai
  lanolin
  lima
  liminal
  limn
  limo
  lion
  loin
  maid
  mail
  mailman
  maim
  main
  mainland
  mammalian
  mania
  manila
  midi
  midland
  mild
  mill
  million
  mind
  mini
  minim
  minima
  minimal
  minion
  moil
  monomania
  monomial
  naiad
  nail
  nominal
  nonillion
  oilman
  olio
  onion