6 letter words:
fabber13,
barbet10,
barbut10,
rabbet10,
tubber10,
arbute8,
5 letter words:
fubar10,
barbe9,
after8,
feuar8,
beaut7,
brute7,
buret7,
rebut7,
taber7,
tubae7,
tuber7,
urate5,
4 letter words:
barf9,
abbe8,
babe8,
babu8,
barb8,
burb8,
fare7,
fart7,
fate7,
fear7,
feat7,
feta7,
frae7,
frat7,
fret7,
raft7,
reft7,
tref7,
tufa7,
turf7,
abet6,
abut6,
bare6,
bate6,
bear6,
beat6,
beau6,
beta6,
brae6,
brat6,
brut6,
bura6,
bute6,
rube6,
tabu6,
tuba6,
tube6,
rate4,
tare4,
tear4,
true4,
urea4,
3 letter words:
fab8,
fub8,
bub7,
ebb7,
aft6,
arf6,
eft6,
far6,
fat6,
fer6,
fet6,
feu6,
fur6,
ref6,
arb5,
bar5,
bat5,
bet5,
bra5,
bur5,
but5,
reb5,
rub5,
tab5,
tub5,
urb5,
are3,
art3,
ate3,
ear3,
eat3,
eau3,
era3,
eta3,
rat3,
ret3,
rue3,
rut3,
tae3,
tar3,
tau3,
tea3,
uta3,
ute3,
2 letter words:
ef5,
fa5,
fe5,
ab4,
ba4,
be4,
ae2,
ar2,
at2,
er2,
et2,
re2,
ta2,
ut2,