10 letters
- severities14
- sleepiness15
- sparteines14
- specifiers19
- speediness15
- speedsters14
- sphincters19
- spinnerets15
- spleeniest15
- splenetics18
- sportiness14
- spruceness18
- steeliness12
- stencilers15
- stepsister13
- stereopses13
- stereopsis13
- stiffeners17
- strictness14
- stridences15
- strifeless14
- stripeless14
- supervenes19
- supervises18
- susceptive21
- suspensive19
- svelteness16
- sweeteners14
- syncretise16
- tendresses12
- threepence19
- trignesses13
- trimnesses14
- truenesses12
- ventricles19
- ventricose18
- vespertine18
- vicegerent20
- vicereines18
- victresses17
- vilenesses16
- virescence21
- westernise14