Center letter: i
Outer letter: a c h l r v
Answers (46):
  archival
  archrival
  chivalric
  acacia
  acai
  archaic
  aria
  aril
  arrival
  avail
  caviar
  cavil
  chai
  chair
  chia
  chic
  chica
  chichi
  chili
  chill
  cilia
  circa
  cirri
  civic
  civil
  hail
  hair
  hill
  iliac
  laic
  laical
  lair
  liar
  lilac
  lira
  racial
  rail
  railcar
  rial
  rich
  rill
  rival
  vial
  vicar
  villa
  viral