Center letter: g
Outer letter: d e i n p x
Answers (50):
  expending
  deeding
  deepening
  deign
  deigned
  deigning
  depending
  digging
  ding
  dinged
  dinging
  dining
  dipping
  edge
  edged
  edging
  egged
  egging
  ending
  engine
  gene
  genie
  genii
  gigged
  gigging
  ginned
  ginning
  indexing
  indigene
  inning
  needing
  nipping
  nixing
  peeing
  peeping
  pegged
  pegging
  pending
  penning
  pepping
  pidgin
  pigged
  pigging
  pigpen
  ping
  pinged
  pinging
  pining
  pinning
  piping