4 letters
- blur9
- burl9
- burp11
- curf11
- curl9
- farl8
- flap11
- flip11
- flop11
- flub12
- flue9
- flus9
- flux16
- foul9
- four8
- frap10
- frug10
- fuel9
- fugu11
- full10
- furl9
- furs8
- fury10
- gulf11
- gulp11
- guru8
- hurl8
- kuru10
- loup9
- lour6
- luau7
- luff12
- lulu8
- lump12
- lure6
- lurk10
- nurl7
- pelf11
- pfui11
- plug11
- plum12
- plus9
- pouf11
- pour8
- prau8
- prof10
- puff14
- pula9
- pule9
- puli9
- pull10
- pulp12
- puls9
- pure8
- puri8
- purl9
- purr8
- purs8
- rolf8
- roup8
- ruff11
- rule6
- ruly8
- rump11
- slur6
- spur8
- sulu7
- surf8
- turf8
- ulus7
- urus6
3 letters
- alp7
- arf6
- bur7
- cup10
- cur7
- dup8
- elf7
- far6
- fer6
- feu7
- fil7
- fir6
- flu8
- fly9
- fop9
- for6
- fou7
- fro6
- fry8
- fub10
- fud8
- fug9
- fun8
- fur7
- gul7
- hup9
- lap7
- lar4
- leu5
- lip7
- lop7
- lug7
- lum8
- luv9
- lux12
- our4
- pal7
- par6
- per6
- piu7
- ply9
- pol7
- pro6
- pry8
- pub10
- pud8
- pug9
- pul8
- pun8
- pup10
- pur7
- pus7
- put7
- rap6
- ref6
- rep6
- rif6
- rip6
- rub7
- rue4
- rug6
- rum7
- run5
- rut4
- sup7
- tup7
- ulu6
- ump10
- upo7
- ups7
- urb7
- urd5
- urn5
- yup9