Center letter: p
Outer letter: d e i m n t
Answers (66):
  impediment
  pediment
  deep
  deepen
  deepened
  depend
  depended
  dependent
  dipped
  emptied
  epee
  impede
  impeded
  impend
  impended
  impenitent
  independent
  inept
  ninepin
  nipped
  peed
  peen
  peep
  peeped
  pend
  pended
  pendent
  penitent
  penmen
  penne
  penned
  pent
  pepped
  peptide
  petit
  petite
  petted
  pied
  pimp
  pimped
  pine
  pined
  pinned
  pinniped
  pint
  pipe
  piped
  pipet
  pipette
  pipit
  pippin
  pitied
  pitted
  teepee
  temp
  temped
  tempi
  tempt
  tempted
  tenpin
  tepee
  tepid
  tiepin
  tipi
  tipped
  tippet