Center letter: o
Outer letter: a c f m t u
Answers (31):
  factotum
  afoot
  ammo
  atom
  auto
  automat
  automata
  cacao
  camo
  coat
  coca
  cocoa
  coma
  comma
  coot
  cutoff
  cutout
  foam
  foot
  moat
  momma
  moot
  motto
  taco
  tattoo
  toccata
  tofu
  tomato
  tomcat
  toot
  tout