10 letter words:
fulfilling17,
7 letter words:
luffing14,
fulfill13,
filling11,
fulling11,
lulling8,
6 letter words:
fifing13,
fulfil12,
filing10,
ingulf10,
infill9,
5 letter words:
gliff12,
fling9,
flung9,
fungi9,
lungi6,
4 letter words:
guff11,
luff10,
gulf8,
fill7,
full7,
gill5,
gull5,
iglu5,
ling5,
lung5,
lull4,
nill4,
null4,
3 letter words:
iff9,
fig7,
fug7,
fil6,
fin6,
flu6,
fun6,
gin4,
gnu4,
gul4,
gun4,
lug4,
ill3,
lin3,
nil3,
2 letter words:
if5,
in2,
li2,
nu2,
un2,