5 letter words:
unzip16,
4 letter words:
piny9,
puny9,
pyin9,
undy8,
3 letter words:
zip14,
zin12,
puy8,
yip8,
yup8,
yid7,
dip6,
dup6,
pud6,
yin6,
nip5,
pin5,
piu5,
pun5,
din4,
dui4,
dun4,
nid4,
uni3,
2 letter words:
ny5,
yu5,
pi4,
up4,
di3,
id3,
in2,
nu2,
un2,