Center letter: c
Outer letter: a e h i m n
Answers (56):
  machine
  mechanic
  acacia
  acai
  ache
  acme
  acne
  anemic
  cache
  caiman
  came
  cami
  cancan
  cane
  canine
  canna
  chai
  chain
  chance
  chia
  chic
  chica
  chichi
  chime
  chin
  china
  cinch
  cinema
  each
  echinacea
  emcee
  eminence
  enchain
  enhance
  hamachi
  hence
  henchman
  henchmen
  iceman
  icemen
  imminence
  inch
  mace
  maniac
  manic
  mecca
  menace
  mica
  mice
  mimic
  mince
  minicam
  niacin
  nice
  niche
  niece