5 letter words:
grout6,
grunt6,
trugo6,
ungot6,
4 letter words:
gout5,
grot5,
gurn5,
rong5,
rung5,
tong5,
trog5,
trug5,
tung5,
nout4,
ourn4,
ront4,
rout4,
runt4,
torn4,
toun4,
tour4,
tron4,
turn4,
unto4,
3 letter words:
gnu4,
gon4,
gor4,
got4,
gun4,
gur4,
gut4,
nog4,
rug4,
tog4,
tug4,
nor3,
not3,
nur3,
nut3,
ort3,
our3,
out3,
rot3,
run3,
rut3,
ton3,
tor3,
tun3,
urn3,
2 letter words:
go3,
gu3,
ug3,
no2,
nu2,
on2,
or2,
ou2,
to2,
un2,
ur2,
ut2,