Center letter: a
Outer letter: i l r t u v
Answers (57):
  virtual
  alit
  alluvial
  altar
  aria
  aril
  arrival
  atilt
  atria
  atrial
  attar
  aura
  aural
  avail
  avatar
  lair
  lariat
  larva
  larval
  lava
  liar
  lira
  luau
  rail
  raita
  ratatat
  rattail
  rial
  ritual
  rival
  rural
  tail
  tali
  tall
  tallit
  tart
  tartar
  taut
  tiara
  titular
  trail
  trait
  travail
  trial
  trivia
  trivial
  ultra
  uvula
  uvular
  vault
  vial
  villa
  viral
  vital
  vulva
  vulval
  vulvar