Center letter: k
Outer letter: e g i n o v
Answers (24):
  evoking
  eking
  enoki
  evoke
  geek
  geeking
  ginkgo
  inking
  invoke
  invoking
  keen
  keening
  keno
  king
  kinging
  kink
  kinking
  knee
  kneeing
  kook
  nook
  oink
  oinking
  viking