Center letter: d
Outer letter: a c i r t y
Answers (37):
  acridity
  acid
  acidic
  acidity
  acidy
  acrid
  addict
  arcadia
  arid
  aridity
  caddy
  card
  cardiac
  cicada
  daddy
  dairy
  dart
  data
  diacritic
  diary
  dicta
  didact
  didactic
  dirt
  dirty
  ditty
  drat
  dray
  dryad
  dyad
  radar
  radii
  raid
  tardy
  tidy
  triad
  yard