5 letter words:
phone10,
phono10,
4 letter words:
expo13,
exon11,
oxen11,
boho9,
hobo9,
hoop9,
hope9,
phon9,
pooh9,
hone7,
bone6,
boon6,
ebon6,
nope6,
oboe6,
open6,
peon6,
pone6,
poon6,
3 letter words:
hex13,
box12,
pox12,
oxo10,
hep8,
hob8,
hop8,
peh8,
poh8,
bop7,
hen6,
hoe6,
hon6,
noh6,
oho6,
ooh6,
ben5,
boo5,
neb5,
nob5,
obe5,
ope5,
pen5,
poo5,
eon3,
noo3,
one3,
ono3,
2 letter words:
ex9,
ox9,
eh5,
he5,
ho5,
oh5,
be4,
bo4,
op4,
pe4,
en2,
ne2,
no2,
oe2,
on2,