5 letter words:
befit10,
4 letter words:
biff12,
keef11,
kief11,
bike10,
fief10,
fife10,
kibe10,
teff10,
tiff10,
beef9,
feeb9,
keet8,
kite8,
tike8,
feet7,
fete7,
beet6,
bite6,
3 letter words:
kef10,
kif10,
eff9,
iff9,
fib8,
eek7,
eke7,
kit7,
eft6,
fee6,
fet6,
fie6,
fit6,
bee5,
bet5,
bit5,
tee3,
tie3,
2 letter words:
ki6,
ef5,
fe5,
if5,
be4,
bi4,
et2,
it2,
ti2,