9 letter words:
surfbirds15,
8 letter words:
surfbird14,
6 letter words:
ursids7,
5 letter words:
birds8,
burds8,
dribs8,
drubs8,
surfs8,
birrs7,
briss7,
burrs7,
durrs6,
surds6,
ursid6,
risus5,
4 letter words:
fibs9,
fubs9,
difs8,
fids8,
fuds8,
bids7,
bird7,
buds7,
burd7,
dibs7,
drib7,
drub7,
dubs7,
firs7,
furs7,
fuss7,
rifs7,
surf7,
birr6,
bris6,
burr6,
burs6,
buss6,
ribs6,
rubs6,
sibs6,
subs6,
urbs6,
diss5,
durr5,
rids5,
suds5,
surd5,
urds5,
sirs4,
sris4,
3 letter words:
fib8,
fub8,
dif7,
fid7,
fud7,
bid6,
bud6,
dib6,
dub6,
fir6,
fur6,
ifs6,
rif6,
bis5,
brr5,
bur5,
bus5,
rib5,
rub5,
sib5,
sub5,
urb5,
dis4,
dui4,
ids4,
rid4,
urd4,
sir3,
sis3,
sri3,
2 letter words:
if5,
bi4,
id3,
is2,
si2,
us2,
