5 letters
- serac8
- serai5
- serin6
- sewan9
- shine8
- sices8
- sieur6
- since9
- sines6
- sinew9
- singe8
- sinus7
- siren6
- skean10
- skein10
- slain7
- slice9
- snack13
- snafu10
- snail7
- snake10
- snare6
- sneak10
- sneap9
- sneck13
- snick13
- snide7
- snipe9
- snuck14
- sonic9
- space11
- spean9
- spica11
- spice11
- spine9
- stain6
- stane6
- stein6
- suave10
- sucre9
- suing9
- suint7
- suite6
- sulci10
- sumac12
- sunna8
- sunns8
- sunny10
- swain9
- swine9
- taces8
- tains6
- tenia6
- tinea6
- tines6
- tunas7
- tunes7
- tunic10
- ukase10
- ulans8
- ulnae8
- ulnas8
- umiac12
- unais7
- unaus8
- unban11
- uncap13
- uncia10
- uncle11
- uncos10
- uncus11
- union8
- unite7
- units7
- unman11
- unpen11
- unpin11
- unsay9
- unset7
- unsew10
- unsex14
- untie7
- uraei6
- urase6
- ureas6
- ureic9
- urine7
- ursae6
- usage8
- using9
- usnea7
- uveas10
- vanes10
- veins10
- venin11
- vices12
- vinas10
- vinca13
- vines10
- wains9
- wanes9
- weans9
- wince12
- wines9
- xenia13
- xenic16
- yeans8
- yince11
- yuans9
- yucas11
- zeins15
- zincs18