6 letter words:
finers9,
infers9,
5 letter words:
fenis8,
ferns8,
fiers8,
finer8,
fines8,
fires8,
firns8,
fries8,
frise8,
infer8,
neifs8,
niefs8,
nifes8,
reifs8,
serif8,
reins5,
resin5,
rines5,
rinse5,
risen5,
serin5,
siren5,
4 letter words:
feis7,
feni7,
fens7,
fern7,
fier7,
fine7,
fins7,
fire7,
firn7,
firs7,
fris7,
nefs7,
neif7,
nief7,
nife7,
refs7,
reif7,
rife7,
rifs7,
seif7,
serf7,
erns4,
ires4,
nies4,
rein4,
reis4,
rens4,
rine4,
rins4,
rise4,
seir4,
sien4,
sine4,
sire4,
3 letter words:
efs6,
erf6,
fen6,
fer6,
fes6,
fie6,
fin6,
fir6,
ifs6,
nef6,
ref6,
rif6,
sif6,
ens3,
ern3,
ers3,
ins3,
ire3,
nie3,
nis3,
rei3,
ren3,
res3,
rin3,
sei3,
sen3,
ser3,
sin3,
sir3,
sri3,
2 letter words:
ef5,
fe5,
if5,
en2,
er2,
es2,
in2,
is2,
ne2,
re2,
si2,