9 letter words:
difficult18,
7 letter words:
fluidic13,
6 letter words:
fitful12,
5 letter words:
cliff13,
clift10,
fluid9,
lucid8,
ludic8,
culti7,
licit7,
4 letter words:
cuff12,
diff11,
duff11,
luff10,
tiff10,
tuff10,
cuif9,
flic9,
fuci9,
duci7,
duct7,
flit7,
lift7,
cult6,
duit5,
litu4,
3 letter words:
iff9,
dif7,
fid7,
fud7,
cud6,
fil6,
fit6,
flu6,
cut5,
tic5,
dit4,
dui4,
lid4,
lit3,
til3,
tui3,
2 letter words:
if5,
id3,
it2,
li2,
ti2,
ut2,