Center letter: i
Outer letter: a c e h m n
Answers (57):
  machine
  mechanic
  acacia
  acai
  anemia
  anemic
  anima
  anime
  caiman
  cami
  canine
  chai
  chain
  chia
  chic
  chica
  chichi
  chime
  chin
  china
  cinch
  cinema
  echinacea
  eminence
  enchain
  hamachi
  heinie
  iceman
  icemen
  imam
  imminence
  inane
  inch
  innie
  mahimahi
  maim
  main
  mania
  maniac
  manic
  meanie
  mica
  mice
  mien
  mime
  mimic
  mince
  mine
  mini
  minicam
  minim
  minima
  niacin
  nice
  niche
  niece
  nine