6 letter words:
frozen18,
5 letter words:
forze17,
froze17,
ozone14,
zoner14,
freon8,
roneo5,
4 letter words:
ooze13,
orzo13,
zero13,
zone13,
zoon13,
fern7,
foen7,
fone7,
fore7,
froe7,
orfe7,
roof7,
oner4,
rone4,
roon4,
3 letter words:
fez15,
rez12,
zoo12,
erf6,
fen6,
fer6,
foe6,
fon6,
for6,
fro6,
nef6,
oof6,
orf6,
ref6,
eon3,
ern3,
noo3,
nor3,
one3,
ono3,
oon3,
oor3,
ore3,
ren3,
reo3,
roe3,
roo3,
2 letter words:
zo11,
ef5,
fe5,
of5,
en2,
er2,
ne2,
no2,
oe2,
on2,
oo2,
or2,
re2,