9 letter words:
nonfrozen21,
7 letter words:
nonzero16,
6 letter words:
frozen18,
5 letter words:
froze17,
ozone14,
zoner14,
4 letter words:
ooze13,
orzo13,
zero13,
zone13,
zoon13,
fern7,
fore7,
froe7,
roof7,
neon4,
none4,
noon4,
3 letter words:
fez15,
zoo12,
fen6,
fer6,
foe6,
fon6,
for6,
fro6,
ref6,
eon3,
ern3,
noo3,
nor3,
one3,
ono3,
ore3,
roe3,
2 letter words:
ef5,
fe5,
of5,
en2,
er2,
ne2,
no2,
oe2,
on2,
or2,
re2,