Center letter: o
Outer letter: a i m r t v
Answers (48):
  motivator
  ammo
  aorta
  armor
  aroma
  atom
  aviator
  imitator
  iota
  marmot
  mirror
  moat
  momma
  moor
  moot
  moratoria
  mortar
  motor
  motto
  omit
  orator
  oratorio
  ratio
  riot
  roam
  roar
  room
  root
  rotator
  roti
  rotor
  taro
  tarot
  tattoo
  tomato
  tomtit
  toot
  tori
  torii
  toro
  tort
  torta
  traitor
  trattoria
  trio
  trot
  vomit
  vroom