Center letter: a
Outer letter: c e i n t y
Answers (60):
  tenacity
  acacia
  acai
  accent
  acetate
  acetic
  acne
  ancient
  ante
  antenna
  antennae
  anti
  antic
  attain
  attic
  cacti
  cancan
  cane
  canine
  canna
  canny
  cant
  cantata
  canteen
  cantina
  catty
  cayenne
  cetacean
  cyan
  eaten
  enact
  inane
  inanity
  incant
  initiate
  innate
  intact
  naan
  nana
  nanny
  natant
  natty
  neat
  neaten
  niacin
  tacet
  tacit
  tact
  tactic
  tactician
  taint
  tannic
  tannin
  tatty
  teat
  tenancy
  tenant
  titan
  titanic
  yenta