7 letter words:
fistier10,
resifts10,
sifters10,
strifes10,
resists7,
sissier7,
sisters7,
6 letter words:
feists9,
firies9,
firsts9,
freits9,
frises9,
frists9,
frites9,
refits9,
resift9,
rifest9,
serifs9,
sifrei9,
sifter9,
strife9,
irises6,
isseis6,
reists6,
resist6,
resits6,
sister6,
stires6,
stress6,
5 letter words:
feist8,
fests8,
fiers8,
fiest8,
fires8,
firie8,
first8,
fists8,
freit8,
frets8,
fries8,
frise8,
frist8,
frits8,
refit8,
reifs8,
rifte8,
rifts8,
seifs8,
serfs8,
serif8,
sifts8,
terfs8,
treif8,
issei5,
reist5,
resit5,
rests5,
rises5,
rites5,
seirs5,
sires5,
siris5,
sises5,
sists5,
sites5,
sties5,
stire5,
stirs5,
tiers5,
tires5,
tress5,
tries5,
4 letter words:
efts7,
feis7,
fess7,
fest7,
fets7,
fier7,
fire7,
firs7,
fist7,
fits7,
fret7,
fris7,
frit7,
refs7,
reft7,
reif7,
rife7,
rifs7,
rift7,
seif7,
serf7,
sift7,
tefs7,
terf7,
tref7,
erst4,
ests4,
ires4,
iris4,
isit4,
reis4,
rest4,
rets4,
rise4,
rite4,
rits4,
seir4,
seis4,
sers4,
sess4,
sets4,
sies4,
sire4,
siri4,
sirs4,
siss4,
sist4,
site4,
sits4,
sris4,
stie4,
stir4,
tier4,
ties4,
tire4,
tres4,
trie4,
3 letter words:
efs6,
eft6,
erf6,
fer6,
fes6,
fet6,
fie6,
fir6,
fit6,
ifs6,
ref6,
rif6,
sif6,
tef6,
ers3,
ess3,
est3,
ire3,
its3,
rei3,
res3,
ret3,
rit3,
sei3,
ser3,
set3,
sir3,
sis3,
sit3,
sri3,
tes3,
tie3,
tis3,
2 letter words:
ef5,
fe5,
if5,
er2,
es2,
et2,
is2,
it2,
re2,
si2,
st2,
te2,
ti2,