Center letter: v
Outer letter: a g i l n t
Answers (29):
  gallivant
  gallivanting
  vigilant
  anvil
  avail
  availing
  avian
  aviating
  giving
  inviting
  lava
  laving
  living
  naval
  navigating
  titivating
  vagal
  vagina
  vaginal
  vain
  valiant
  vanilla
  vanillin
  vial
  vigil
  villa
  villain
  vital
  vitiating