Center letter: n
Outer letter: a c e h i m
Answers (60):
  machine
  mechanic
  acne
  amen
  anemia
  anemic
  anima
  anime
  caiman
  cancan
  cane
  canine
  canna
  chain
  chance
  chin
  china
  cinch
  cinema
  echinacea
  eminence
  enchain
  enema
  enhance
  heinie
  hence
  henchman
  henchmen
  henna
  iceman
  icemen
  imminence
  inane
  inch
  innie
  main
  mane
  mania
  maniac
  manic
  manna
  mean
  meanie
  menace
  mien
  mince
  mine
  mini
  minicam
  minim
  minima
  naan
  name
  nana
  nene
  niacin
  nice
  niche
  niece
  nine