10 letters
- slithering16
- slobbering20
- slubbering21
- slumbering21
- smattering16
- smoldering18
- smothering18
- snickering21
- sniggering18
- snookering18
- soldiering15
- spattering16
- sponsoring17
- sputtering17
- staggering17
- stammering19
- steamering16
- stoppering19
- stuttering14
- succouring21
- sulphuring21
- swaggering20
- sweltering17
- swithering18
- tambouring20
- telphering19
- thundering18
- tincturing18
- trailering14
- treasuring14
- triggering17
- tutoyering16
- twittering16
- unalluring18
- uncovering22
- unmitering18
- unsphering20
- unswearing18
- unwavering22
- upstirring17
- vouchering23
- weathering18
- wellspring21
- whickering25
- whimpering24
- whispering21