Center letter: w
Outer letter: g i k n o r
Answers (38):
  ironworking
  nonworking
  working
  gown
  gowning
  grow
  growing
  grown
  ingrown
  ironwork
  kiwi
  know
  knowing
  known
  owing
  owning
  rowing
  wigging
  wiki
  wing
  winging
  wining
  wink
  winking
  winning
  winnow
  winnowing
  wino
  wiring
  wonk
  wooing
  work
  worn
  wowing
  wring
  wringing
  wrong
  wronging