9 letter words:
protozoan20,
8 letter words:
parazoon19,
protozoa19,
7 letter words:
forzato19,
rooftop12,
patroon9,
pronota9,
6 letter words:
tarzan15,
afront9,
footra9,
partan8,
parton8,
patron8,
pronto8,
proton8,
tarpan8,
tarpon8,
trapan8,
ratoon6,
torana6,
5 letter words:
forza17,
topaz16,
razoo14,
trooz14,
proof10,
afoot8,
front8,
apart7,
aport7,
apron7,
napoo7,
panto7,
poort7,
porno7,
porta7,
potoo7,
prana7,
troop7,
antar5,
antra5,
aorta5,
orant5,
ratan5,
ratoo5,
rotan5,
roton5,
toran5,
trona5,
4 letter words:
zarf16,
azan13,
azon13,
orzo13,
tzar13,
zona13,
zoon13,
zoot13,
frap9,
poof9,
prof9,
afar7,
afro7,
faan7,
fano7,
faro7,
fart7,
font7,
foot7,
fora7,
fort7,
frat7,
raft7,
roof7,
arpa6,
atap6,
atop6,
napa6,
noop6,
pant6,
para6,
part6,
pont6,
poon6,
poor6,
poot6,
porn6,
port6,
prao6,
prat6,
proa6,
proo6,
rapt6,
roop6,
tapa6,
tarp6,
topo6,
trap6,
trop6,
anoa4,
anta4,
arna4,
nota4,
onto4,
oont4,
rana4,
rant4,
rata4,
rato4,
roan4,
ront4,
roon4,
root4,
rota4,
roto4,
tana4,
tara4,
tarn4,
taro4,
toon4,
tora4,
torn4,
toro4,
tron4,
3 letter words:
poz14,
zap14,
azo12,
zoa12,
zoo12,
fap8,
fop8,
aft6,
arf6,
faa6,
fan6,
far6,
fat6,
fon6,
for6,
fra6,
fro6,
oaf6,
oft6,
oof6,
orf6,
apo5,
apt5,
nap5,
oop5,
opt5,
pan5,
par5,
pat5,
poa5,
poo5,
pot5,
pro5,
rap5,
tap5,
top5,
ana3,
ant3,
art3,
nat3,
noo3,
nor3,
not3,
oar3,
oat3,
ono3,
oon3,
oor3,
oot3,
ora3,
ort3,
ran3,
rat3,
roo3,
rot3,
tan3,
tao3,
tar3,
ton3,
too3,
tor3,
2 letter words:
za11,
zo11,
fa5,
of5,
op4,
pa4,
po4,
aa2,
an2,
ar2,
at2,
na2,
no2,
on2,
oo2,
or2,
ta2,
to2,