Center letter: i
Outer letter: a d h n o t
Answers (31):
  nationhood
  addition
  anion
  annotation
  anoint
  anti
  attain
  dhoti
  dino
  dint
  ditto
  donation
  hind
  hint
  idiot
  initiation
  into
  intonation
  iota
  naiad
  nation
  ninth
  notation
  notion
  onion
  tahini
  taint
  tannin
  thin
  tint
  titan