Center letter: v
Outer letter: a d i l t y
Answers (21):
  validity
  avail
  avid
  avidity
  avidly
  diva
  divvy
  lava
  livid
  lividity
  lividly
  valid
  validly
  vial
  villa
  vital
  vitality
  vitally
  vivid
  vividity
  vividly