7 letter words:
bifters12,
fibster12,
6 letter words:
befits11,
bifter11,
briefs11,
fibers11,
fibres11,
freits9,
frites9,
refits9,
resift9,
rifest9,
sifter9,
strife9,
bestir8,
bister8,
bistre8,
biters8,
bitser8,
breist8,
tribes8,
5 letter words:
befit10,
brief10,
fiber10,
fibre10,
fribs10,
feist8,
fiers8,
fiest8,
fires8,
first8,
freit8,
frets8,
fries8,
frise8,
frist8,
frits8,
refit8,
reifs8,
rifte8,
rifts8,
serif8,
terfs8,
treif8,
besit7,
besti7,
biers7,
birse7,
biter7,
bites7,
breis7,
bries7,
brise7,
brits7,
rebit7,
ribes7,
tribe7,
reist5,
resit5,
rites5,
stire5,
tiers5,
tires5,
tries5,
4 letter words:
fibs9,
frib9,
efts7,
feis7,
fest7,
fets7,
fier7,
fire7,
firs7,
fist7,
fits7,
fret7,
fris7,
frit7,
refs7,
reft7,
reif7,
rife7,
rifs7,
rift7,
seif7,
serf7,
sift7,
tefs7,
terf7,
tref7,
best6,
bets6,
bier6,
bise6,
bist6,
bite6,
bits6,
brei6,
brie6,
bris6,
brit6,
rebs6,
ribs6,
erst4,
ires4,
reis4,
rest4,
rets4,
rise4,
rite4,
rits4,
seir4,
sire4,
site4,
stie4,
stir4,
tier4,
ties4,
tire4,
tres4,
trie4,
3 letter words:
fib8,
efs6,
eft6,
erf6,
fer6,
fes6,
fet6,
fie6,
fir6,
fit6,
ifs6,
ref6,
rif6,
sif6,
tef6,
bes5,
bet5,
bis5,
bit5,
reb5,
rib5,
sib5,
ers3,
est3,
ire3,
its3,
rei3,
res3,
ret3,
rit3,
sei3,
ser3,
set3,
sir3,
sit3,
sri3,
tes3,
tie3,
tis3,
2 letter words:
ef5,
fe5,
if5,
be4,
bi4,
er2,
es2,
et2,
is2,
it2,
re2,
si2,
st2,
te2,
ti2,