4 letters
- muon9
- muse8
- mush10
- musk12
- muss8
- must8
- muts8
- nabs8
- nebs8
- neum9
- nibs8
- nide6
- nidi6
- nils6
- nims8
- nips8
- nisi5
- nits5
- nobs8
- nodi6
- nods6
- noms8
- nous6
- nubs9
- nude7
- numb12
- nuns7
- nurd7
- nuts6
- obis7
- onus6
- ouds6
- pins8
- pubs11
- puds9
- puns9
- quid15
- quin15
- ribs7
- rids5
- rims7
- rind6
- rins5
- rubs8
- ruin6
- rums8
- runs6
- sadi5
- said5
- sain5
- sand6
- scud9
- scum11
- semi7
- send6
- shim9
- shin7
- shun8
- sibb10
- sibs7
- side5
- sign7
- sild6
- sima7
- simp10
- sims7
- sine5
- sing7
- sinh7
- sink9
- sins5
- skid9
- skim11
- skin9
- slid6
- slim8
- slub9
- slum9
- smit7
- smug10
- smut8
- sned6
- snib8
- snip8
- snit5
- snob8
- snub9
- snug8
- spin8
- spud9
- spun9
- stub8
- stud6
- stum8
- stun6
- suba8
- subs8
- sudd7
- suds6
- sued6
- suit5
- sulu7
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- surd6
- swim10
- swum11
- tins5
- tubs8
- tuis5
- tuns6
- udos6
- ulus7
- umbo11
- umps11
- unai6
- unau7
- unbe9
- unci9
- unde7
- undo7
- undy9
- unit6
- urbs8
- urds6
- urns6
- urus6
- used6
- vims11
- wind9
- wins8
- yids7
- yins7
- zins14