6 letter words:
frieze18,
biffer14,
effeir12,
5 letter words:
frize17,
brize16,
fifer11,
brief10,
fiber10,
fibre10,
fiere8,
4 letter words:
ziff19,
friz16,
bize15,
biff12,
fief10,
fife10,
riff10,
beef9,
feeb9,
frib9,
feer7,
fere7,
fier7,
fire7,
free7,
reef7,
reif7,
rife7,
beer6,
bere6,
bier6,
bree6,
brei6,
brie6,
3 letter words:
fez15,
fiz15,
bez14,
biz14,
rez12,
riz12,
zee12,
eff9,
iff9,
fib8,
erf6,
fee6,
fer6,
fie6,
fir6,
ref6,
rif6,
bee5,
reb5,
rib5,
ere3,
ire3,
ree3,
rei3,
2 letter words:
ef5,
fe5,
if5,
be4,
bi4,
ee2,
er2,
re2,