7 letter words:
grownup13,
upgrown13,
6 letter words:
upgrow12,
progun9,
5 letter words:
grown9,
wrong9,
wrung9,
group8,
prong8,
4 letter words:
pown9,
prow9,
gnow8,
gown8,
grow8,
gorp7,
pong7,
prog7,
pung7,
upgo7,
worn7,
noup6,
porn6,
pour6,
roup6,
upon6,
gurn5,
rong5,
rung5,
ourn4,
3 letter words:
pow8,
wop8,
wog7,
gup6,
now6,
own6,
pug6,
row6,
won6,
oup5,
pro5,
pun5,
pur5,
upo5,
urp5,
gnu4,
gon4,
gor4,
gun4,
gur4,
nog4,
rug4,
nor3,
nur3,
our3,
run3,
urn3,
2 letter words:
ow5,
wo5,
op4,
po4,
up4,
go3,
gu3,
ug3,
no2,
nu2,
on2,
or2,
ou2,
un2,
ur2,
