5 letter words:
puffs13,
spiff13,
riffs11,
ruffs11,
puris7,
sirup7,
usurp7,
4 letter words:
puff12,
riff10,
ruff10,
pfui9,
spif9,
firs7,
fris7,
furs7,
rifs7,
surf7,
pirs6,
puir6,
puri6,
purs6,
rips6,
risp6,
spur6,
urps6,
urus4,
3 letter words:
iff9,
fir6,
fur6,
ifs6,
rif6,
sif6,
pir5,
pis5,
piu5,
psi5,
pur5,
pus5,
rip5,
sip5,
sup5,
ups5,
urp5,
sir3,
sri3,
sui3,
sur3,
2 letter words:
if5,
pi4,
up4,
is2,
si2,
ur2,
us2,