7 letter words:
brevier12,
briefer12,
6 letter words:
reverb11,
refire9,
reiver9,
riever9,
verier9,
5 letter words:
fever11,
fiver11,
breve10,
brief10,
fiber10,
fibre10,
firer8,
freer8,
frere8,
frier8,
refer8,
reive8,
rifer8,
river8,
brier7,
4 letter words:
five10,
beef9,
feeb9,
verb9,
vibe9,
ever7,
fere7,
fire7,
free7,
reef7,
reif7,
rife7,
rive7,
veer7,
vier7,
beer6,
bier6,
birr6,
bree6,
brie6,
3 letter words:
fib8,
eve6,
fee6,
fer6,
fie6,
fir6,
ref6,
rev6,
rif6,
vee6,
vie6,
bee5,
brr5,
reb5,
rib5,
ere3,
err3,
ire3,
ree3,
rei3,
2 letter words:
ef5,
fe5,
if5,
be4,
bi4,
er2,
re2,