4 letter words:
busy9,
buys9,
inby9,
yins7,
bins6,
buns6,
nibs6,
nubs6,
snib6,
snub6,
3 letter words:
buy8,
bys8,
syn6,
yin6,
bin5,
bis5,
bun5,
bus5,
nib5,
nub5,
sib5,
sub5,
ins3,
nus3,
sin3,
sun3,
uns3,
2 letter words:
by7,
bi4,
in2,
is2,
nu2,
si2,
un2,
us2,