6 letter words:
better8,
teeter6,
terete6,
tetter6,
5 letter words:
beret7,
4 letter words:
beer6,
beet6,
bere6,
bete6,
bree6,
rete4,
teer4,
tete4,
tree4,
tret4,
3 letter words:
bee5,
bet5,
reb5,
ere3,
ree3,
ret3,
tee3,
tet3,
2 letter words:
be4,
ee2,
er2,
et2,
re2,
te2,