11 letter words:
prototrophy21,
10 letter words:
phototropy20,
orthotropy18,
prototroph17,
6 letter words:
trophy14,
toothy12,
hotpot11,
troppo10,
toroth9,
torpor8,
5 letter words:
hoppy15,
hooty11,
hotty11,
photo10,
porty10,
potty10,
roopy10,
thorp10,
typto10,
ortho8,
rooty8,
rorty8,
thoro8,
tooth8,
troth8,
poort7,
potoo7,
potto7,
troop7,
rotor5,
torot5,
4 letter words:
hypo12,
typp11,
hoop9,
phot9,
pooh9,
pory9,
pyot9,
pyro9,
ropy9,
toph9,
tryp9,
typo9,
yoop9,
yorp9,
oppo8,
poop8,
prop8,
hoot7,
rory7,
ryot7,
thro7,
toho7,
tory7,
toyo7,
troy7,
tyro7,
poor6,
poot6,
port6,
pott6,
proo6,
roop6,
topo6,
trop6,
otto4,
root4,
rort4,
roto4,
toot4,
toro4,
torr4,
tort4,
trot4,
3 letter words:
hyp11,
hoy9,
rhy9,
thy9,
hop8,
pho8,
pht8,
poh8,
pry8,
pop7,
hoo6,
hot6,
oho6,
ooh6,
rho6,
tho6,
toy6,
try6,
oop5,
opt5,
poo5,
pot5,
pro5,
top5,
oor3,
oot3,
ort3,
roo3,
rot3,
too3,
tor3,
tot3,
2 letter words:
ho5,
oh5,
oy5,
yo5,
op4,
po4,
oo2,
or2,
to2,