Center letter: e
Outer letter: g h i n o c
Answers (36):
  echoing
  choice
  cone
  congee
  echo
  echoic
  egging
  eggnog
  engine
  gene
  genie
  genii
  ghee
  gone
  heinie
  hence
  henge
  hinge
  hoeing
  hone
  innie
  innocence
  neigh
  neighing
  nene
  neocon
  neon
  nice
  niche
  niece
  nine
  nonce
  none
  noogie
  ogee
  once