5 letter words:
proof10,
forgo9,
karoo9,
pargo8,
4 letter words:
fork11,
park10,
pork10,
frap9,
gook9,
grok9,
poof9,
prof9,
frag8,
frog8,
goof8,
kora8,
okra8,
rook8,
faro7,
fora7,
goop7,
gorp7,
prog7,
roof7,
poor6,
prao6,
proa6,
3 letter words:
kaf10,
kop9,
fop8,
ark7,
fag7,
fog7,
koa7,
kor7,
oak7,
oka7,
arf6,
far6,
for6,
fro6,
gap6,
oaf6,
apo5,
par5,
poo5,
pro5,
rap5,
ago4,
gar4,
goa4,
goo4,
gor4,
rag4,
oar3,
ora3,
2 letter words:
ka6,
fa5,
of5,
op4,
pa4,
ag3,
go3,
ar2,
or2,