Center letter: a
Outer letter: h m n o p t
Answers (42):
  phantom
  ammo
  anon
  atom
  atop
  hath
  hatha
  mahatma
  mama
  mamma
  mammon
  mammoth
  manhattan
  manna
  manta
  math
  moan
  moat
  momma
  naan
  nana
  natant
  oath
  oompah
  ottoman
  pampa
  panama
  pant
  papa
  path
  phat
  photomap
  pompano
  poppa
  potato
  tamp
  tampon
  tapa
  tattoo
  than
  that
  tomato