5 letters:
babel, babul, babur, botel, catel, codle, dogle, gagel, godel, gogol, kabel, kabir, kabul, kadel, pagel, tapir, tobol

6 letters:
babble, battel, battle, boggle, bottel, bottle, cackel, cackle, calker, cappel, cattle, caudal, cobber, cobble, coccal, cockal, cockle, coddle, coggle, coppel, copple, cottle, dabble, daddle, daggle, dapple, dobber, dodder, doddle, dopper, dottle, gabble, gaggle, gobble, gockel, goggle, kachel, kadder, kappel, kochel, koppel, kopple, paddle, podoll, popple, pottle, tabour, tackle, tattle, toddle, toggle, topple

7 letters:
baccare, backare, caddell, cadelle, catarrh, gabelle, got ill, kapelle, koppell, poppell, ta kill

8 letters:
bob hill, cat hill, got till, pat hill, top hill

9 letters:
back hill