7 letter words:
frisbee12,
refines10,
6 letter words:
briefs11,
fibers11,
fibres11,
enserf9,
ferine9,
frisee9,
infers9,
refine9,
biners8,
brines8,
nereis6,
seiner6,
serein6,
serine6,
5 letter words:
beefs10,
brief10,
feebs10,
fiber10,
fibre10,
feres8,
ferns8,
finer8,
fines8,
fires8,
firns8,
frees8,
fries8,
frise8,
infer8,
neifs8,
reefs8,
reifs8,
serif8,
beers7,
benes7,
biers7,
biner7,
bines7,
birse7,
brees7,
brens7,
bries7,
brine7,
brins7,
ribes7,
ernes5,
reins5,
resin5,
rinse5,
risen5,
seine5,
serin5,
siree5,
siren5,
sneer5,
4 letter words:
beef9,
feeb9,
fibs9,
fees7,
fens7,
fere7,
fern7,
fine7,
fins7,
fire7,
firn7,
firs7,
free7,
neif7,
reef7,
refs7,
reif7,
rife7,
rifs7,
seif7,
serf7,
been6,
beer6,
bees6,
bene6,
bens6,
bier6,
bine6,
bins6,
bise6,
bree6,
bren6,
brie6,
brin6,
bris6,
nebs6,
nibs6,
rebs6,
ribs6,
snib6,
erne4,
erns4,
esne4,
ires4,
rees4,
rein4,
reis4,
rins4,
rise4,
seen4,
seer4,
sene4,
sere4,
sine4,
sire4,
3 letter words:
fib8,
efs6,
fee6,
fen6,
fer6,
fes6,
fie6,
fin6,
fir6,
ifs6,
ref6,
rif6,
bee5,
ben5,
bes5,
bin5,
bis5,
neb5,
nib5,
reb5,
rib5,
sib5,
ens3,
ere3,
ern3,
ers3,
ins3,
ire3,
nee3,
ree3,
rei3,
res3,
rin3,
see3,
sei3,
sen3,
ser3,
sin3,
sir3,
sri3,
2 letter words:
ef5,
fe5,
if5,
be4,
bi4,
en2,
er2,
es2,
in2,
is2,
ne2,
re2,
si2,