Center letter: e
Outer letter: f g i l n o
Answers (59):
  lifelong
  egging
  eggnog
  elfin
  engine
  feel
  feeling
  feign
  feigning
  feline
  fell
  felling
  felon
  fennel
  fief
  fife
  file
  fine
  flee
  fleeing
  floe
  gelee
  gelling
  gene
  genie
  genii
  giggle
  glee
  glen
  goggle
  gone
  google
  innie
  legging
  legion
  leonine
  liege
  lien
  life
  lifeline
  line
  linen
  loge
  lone
  loonie
  negligee
  nene
  neon
  niggle
  nine
  noel
  none
  noogie
  offline
  ogee
  ogle
  oleo
  ollie
  online