Center letter: a
Outer letter: i j m n r u
Answers (29):
  marijuana
  airman
  ajar
  anima
  aria
  arum
  aura
  imam
  maim
  main
  mama
  mamma
  mania
  manna
  marina
  marinara
  marm
  minima
  naan
  nana
  ninja
  rain
  raja
  rani
  umami
  unarm
  unjam
  unman
  uranium