6 letter words:
hereto9,
hetero9,
rhetor9,
retore6,
5 letter words:
ether8,
other8,
there8,
three8,
throe8,
retro5,
4 letter words:
heth10,
here7,
hero7,
hoer7,
thee7,
thro7,
rete4,
rote4,
tore4,
torr4,
tree4,
3 letter words:
heh9,
eth6,
her6,
het6,
hoe6,
hot6,
rho6,
the6,
tho6,
ere3,
err3,
ore3,
ort3,
ree3,
ret3,
roe3,
rot3,
tee3,
toe3,
tor3,
2 letter words:
eh5,
he5,
ho5,
oh5,
er2,
et2,
oe2,
or2,
re2,
to2,