Center letter: a
Outer letter: g i j m n u
Answers (47):
  unjamming
  again
  aging
  aiming
  angina
  anima
  gaga
  gagging
  gain
  gaining
  gamin
  gaming
  gamma
  gang
  ganging
  ganja
  gauging
  gunman
  iguana
  imaging
  imagining
  imam
  jagging
  jamming
  magi
  magma
  magnum
  maim
  maiming
  main
  mama
  mamma
  managing
  manga
  mania
  manna
  manning
  minima
  naan
  nagging
  naming
  nana
  ninja
  umami
  unjam
  unman
  unmanning