6 letter words:
frieze18,
feirie9,
5 letter words:
frize17,
fixer15,
refix15,
fiere8,
firie8,
4 letter words:
friz16,
feer7,
fere7,
fier7,
fire7,
free7,
reef7,
reif7,
rife7,
3 letter words:
zex19,
fez15,
fiz15,
fix13,
rez12,
riz12,
zee12,
rex10,
erf6,
fee6,
fer6,
fie6,
fir6,
ref6,
rif6,
ere3,
ire3,
ree3,
rei3,
2 letter words:
ex9,
xi9,
ef5,
fe5,
if5,
ee2,
er2,
re2,