Center letter: i
Outer letter: a c h m r t
Answers (47):
  matriarch
  acacia
  acai
  archaic
  arctic
  aria
  armchair
  arthritic
  atria
  attic
  cacti
  cami
  cathartic
  chai
  chair
  chia
  chic
  chica
  chichi
  chit
  chitchat
  circa
  cirri
  citric
  critic
  hair
  hamachi
  hamartia
  hitch
  imam
  itch
  mahimahi
  maim
  mariachi
  mica
  mimic
  mirth
  mitt
  raita
  rich
  tacit
  tactic
  tamari
  tatami
  tiara
  trait
  trim