7 letter words:
sunning8,
5 letter words:
suing6,
using6,
4 letter words:
ginn5,
gins5,
gnus5,
guns5,
sign5,
sing5,
snig5,
snug5,
sung5,
inns4,
nuns4,
sunn4,
unis4,
3 letter words:
gin4,
gis4,
gnu4,
gun4,
gus4,
ugs4,
inn3,
ins3,
nis3,
nun3,
nus3,
sin3,
sui3,
sun3,
uni3,
uns3,
2 letter words:
gi3,
gu3,
ug3,
in2,
is2,
nu2,
si2,
un2,
us2,
