11 letter words:
heterotroph19,
9 letter words:
orthopter14,
8 letter words:
potterer10,
7 letter words:
thereto10,
proette9,
treetop9,
trooper9,
6 letter words:
hooper11,
pother11,
thorpe11,
threep11,
hereto9,
hetero9,
hooter9,
hotter9,
rhetor9,
tether9,
toroth9,
tother9,
perter8,
petter8,
poorer8,
porter8,
potter8,
pretor8,
report8,
torpor8,
retore6,
retort6,
rooter6,
rotter6,
terret6,
tooter6,
torero6,
5 letter words:
ephor10,
hoper10,
photo10,
thorp10,
tophe10,
ether8,
ortho8,
other8,
teeth8,
there8,
thoro8,
three8,
throe8,
tooth8,
troth8,
peter7,
petto7,
potto7,
repot7,
repro7,
roper7,
topee7,
toper7,
troop7,
trope7,
otter5,
retro5,
rotor5,
rotte5,
torot5,
torte5,
toter5,
4 letter words:
heth10,
hoop9,
hope9,
phot9,
pooh9,
toph9,
here7,
hero7,
hoer7,
hoot7,
teth7,
thee7,
thro7,
peer6,
pere6,
pert6,
poet6,
poor6,
pore6,
port6,
pree6,
repo6,
rope6,
tope6,
topo6,
trop6,
otto4,
rete4,
root4,
rote4,
roto4,
toot4,
tore4,
toro4,
torr4,
tort4,
tote4,
tree4,
tret4,
trot4,
3 letter words:
heh9,
hep8,
hop8,
peh8,
pht8,
poh8,
eth6,
her6,
het6,
hoe6,
hot6,
oho6,
ooh6,
rho6,
the6,
tho6,
ope5,
opt5,
pee5,
per5,
pet5,
poo5,
pot5,
pro5,
rep5,
top5,
ere3,
err3,
oot3,
ore3,
ort3,
ree3,
ret3,
roe3,
rot3,
tee3,
tet3,
toe3,
too3,
tor3,
tot3,
2 letter words:
eh5,
he5,
ho5,
oh5,
op4,
pe4,
er2,
et2,
oe2,
or2,
re2,
to2,