10 letter words:
pipelining15,
9 letter words:
lippening14,
7 letter words:
lipping12,
nipping12,
peining10,
6 letter words:
pigpen11,
piping11,
lippen10,
nipple10,
pieing9,
piling9,
pining9,
lignin7,
lining7,
5 letter words:
genip8,
piing8,
lipin7,
penni7,
pilei7,
genii6,
ingle6,
linen5,
linin5,
4 letter words:
pipe8,
ping7,
lipe6,
pein6,
pile6,
pili6,
pine6,
plie6,
gien5,
glen5,
ling5,
lien4,
line4,
linn4,
nine4,
3 letter words:
pep7,
pip7,
gip6,
peg6,
pig6,
lip5,
nip5,
pen5,
pie5,
pin5,
eng4,
gel4,
gen4,
gie4,
gin4,
leg4,
neg4,
inn3,
lei3,
lie3,
lin3,
nil3,
2 letter words:
pe4,
pi4,
el2,
en2,
in2,
li2,
ne2,