Center letter: m
Outer letter: b g i n p u
Answers (26):
  bumping
  bumming
  bump
  gimp
  gumming
  imbibing
  imbuing
  impinging
  impugn
  impugning
  miming
  mini
  minim
  minimum
  mining
  mugging
  mung
  muumuu
  nimbi
  numb
  numbing
  pimp
  pimping
  pump
  pumping
  umping