5 letters
- acerb11
- bluer10
- brace11
- brume12
- brute9
- buret9
- burke13
- burse9
- buyer11
- caber11
- crude10
- cruel10
- cruet9
- crumb15
- cruse9
- cubeb15
- cubed13
- cuber12
- cubes12
- curbs12
- cured10
- curer9
- cures9
- curet9
- curie9
- curse9
- curve13
- cuter9
- ecrus9
- eruct9
- exurb16
- lucre10
- rebec11
- rebus9
- rebut9
- rebuy11
- recur9
- recut9
- redub10
- rubes9
- ruble10
- ruche11
- scrub12
- suber9
- sucre9
- truce9
- tuber9
- ulcer10
- umber12
- ureic9
4 letters
- acre7
- bare7
- bear7
- beau8
- beck14
- bedu9
- beer7
- berg9
- berm10
- bice10
- bier7
- blue9
- blur9
- bore7
- brae7
- bred8
- bree7
- bren8
- brew10
- brie7
- brut8
- buck15
- buhr10
- bura8
- burd9
- burg10
- burl9
- burn9
- burp11
- burr8
- burs8
- bury10
- bute8
- byre9
- carb10
- care7
- cere7
- cero7
- chub13
- cire7
- club12
- clue9
- core7
- crab10
- crew10
- crib10
- crud9
- crus8
- crux15
- cube11
- cubs11
- cued9
- cues8
- cuke12
- curb11
- curd9
- cure8
- curf11
- curl9
- curn9
- curr8
- curs8
- curt8
- cute8
- drub9
- duce9
- dure6
- ecru8
- ecus8
- euro5
- grub10
- grue7
- herb9
- jube17
- kerb11
- lube9
- luce9
- lure6
- mure8
- puce11
- pure8
- race7
- rebs7
- reck11
- recs7
- rice7
- robe7
- roue5
- rube8
- rubs8
- ruby10
- ruck12
- rude6
- rued6
- ruer5
- rues5
- rule6
- rune6
- ruse5
- suer5
- sure5
- true5
- tube8
- unbe9
- urbs8
- urea5
- urge7
- uric8
- user5
- verb11
- zebu17
3 letters
- ace6
- arb6
- arc6
- are3
- bar6
- bed7
- bee6
- beg8
- bel7
- ben7
- bet6
- bey8
- bra6
- bro6
- brr6
- bub10
- bud8
- bug9
- bum10
- bun8
- bur7
- bus7
- but7
- buy9
- bye8
- cab9
- car6
- cee6
- cel7
- cep9
- cob9
- cor6
- cry8
- cub10
- cud8
- cue7
- cum10
- cup10
- cur7
- cut7
- deb7
- dub8
- due5
- ear3
- eau4
- ebb9
- ecu7
- emu7
- era3
- ere3
- erg5
- ern4
- err3
- ers3
- fer6
- feu7
- fub10
- fur7
- her5
- hub9
- hue6
- ice6
- ire3
- jeu13
- kue8
- leu5
- neb7
- nub8
- obe6
- orb6
- orc6
- ore3
- our4
- pec9
- per6
- pub10
- pur7
- reb6
- rec6
- red4
- ree3
- ref6
- reg5
- rei3
- rem6
- rep6
- res3
- ret3
- rev7
- rex10
- rib6
- rob6
- roc6
- roe3
- rub7
- rue4
- rug6
- rum7
- run5
- rut4
- rye5
- sec6
- ser3
- sub7
- sue4
- tub7
- uke8
- urb7
- urd5
- urn5
- use4
- web9