Center letter: a
Outer letter: h k m o t w
Answers (29):
  tomahawk
  ammo
  amok
  atom
  haka
  hath
  hatha
  hawk
  hookah
  mahatma
  mako
  mama
  mamma
  mammoth
  math
  moat
  mohawk
  momma
  oath
  tattoo
  that
  thaw
  tomato
  wahoo
  watt
  wham
  whammo
  what
  whoa