7 letter words:
twibill12,
6 letter words:
twilly12,
wilily12,
twibil11,
5 letter words:
willy11,
billy10,
bully10,
butyl10,
tilly8,
twill8,
built7,
4 letter words:
wily10,
illy7,
lily7,
wili7,
will7,
wilt7,
wull7,
yill7,
bill6,
bull6,
lilt4,
litu4,
luit4,
till4,
3 letter words:
buy8,
iwi6,
wit6,
bit5,
but5,
lib5,
tub5,
ill3,
lit3,
til3,
tui3,
2 letter words:
by7,
yu5,
bi4,
it2,
li2,
ti2,
ut2,