9 letter words:
upfilling15,
7 letter words:
upfling13,
filling11,
fulling11,
pilling10,
pulling10,
6 letter words:
fillip11,
upfill11,
filing10,
ingulf10,
infill9,
piling9,
puling9,
illupi8,
ulling7,
5 letter words:
fling9,
flung9,
fungi9,
piing8,
pling8,
pugil8,
lipin7,
lupin7,
pulli7,
lungi6,
4 letter words:
flip9,
pfui9,
fung8,
gulf8,
fill7,
fini7,
full7,
gulp7,
ping7,
plug7,
pung7,
pili6,
pill6,
puli6,
pull6,
gill5,
gull5,
iglu5,
ling5,
lung5,
nill4,
null4,
3 letter words:
fig7,
fug7,
gif7,
fil6,
fin6,
flu6,
fun6,
gip6,
gup6,
pig6,
pug6,
lip5,
nip5,
pin5,
piu5,
plu5,
pul5,
pun5,
gin4,
gnu4,
gul4,
gun4,
lig4,
lug4,
ill3,
lin3,
nil3,
uni3,
2 letter words:
if5,
pi4,
up4,
gi3,
gu3,
ug3,
in2,
li2,
nu2,
un2,