Center letter: d
Outer letter: g h i n o t
Answers (33):
  goodnight
  hotdogging
  dhoti
  digging
  digit
  ding
  dinging
  dingo
  dining
  dino
  dint
  ditto
  dodging
  dodo
  dogging
  doggo
  doing
  dong
  donning
  doth
  doting
  dotting
  good
  hiding
  hind
  hood
  hooding
  hoodoo
  hotdog
  idiot
  indigo
  nodding
  tiding