Center letter: a
Outer letter: c f i l t y
Answers (68):
  facility
  acacia
  acai
  acyclic
  afflict
  alfalfa
  alit
  allay
  ally
  atilt
  attic
  cacti
  calcify
  calf
  call
  calla
  catalytic
  catalytically
  catcall
  cattail
  cattily
  catty
  cilia
  clay
  cyclical
  cyclically
  facial
  facially
  fact
  facticity
  fail
  fall
  fallacy
  fatal
  fatality
  fatally
  fatly
  fatty
  fiat
  filial
  filially
  flail
  flat
  flatly
  flay
  iliac
  italic
  lactic
  lacy
  laic
  laical
  laity
  lilac
  tacit
  tacitly
  tact
  tactic
  tactical
  tactically
  tactility
  taffy
  tail
  talc
  tali
  tall
  tallit
  tally
  tatty