Center letter: p
Outer letter: c d e i n t
Answers (66):
  centipede
  deep
  deepen
  deepened
  depend
  depended
  dependence
  dependent
  depict
  depicted
  dipped
  epee
  epic
  epicene
  incipience
  incipient
  independence
  independent
  inept
  ninepin
  nipped
  pectin
  peed
  peen
  peep
  peeped
  pence
  pend
  pended
  pendent
  penitence
  penitent
  penne
  penned
  pent
  pepped
  peptic
  peptide
  petit
  petite
  petted
  picnic
  piece
  pieced
  pied
  pine
  pined
  pinned
  pinniped
  pint
  pipe
  piped
  pipet
  pipette
  pipit
  pippin
  pitied
  pitted
  teepee
  tenpin
  tepee
  tepid
  tiepin
  tipi
  tipped
  tippet