10 letters
- soothsayer14
- sopapillas18
- spaceports19
- spaceships21
- spaciously20
- speciously20
- spheroidal17
- spirogyras17
- splotchier19
- spoilsport17
- spoliators14
- sponsorial15
- sporangial17
- sporocarps19
- sporogenic19
- sporophyll22
- sporophyte20
- supercoils18
- supercools18
- synalephas19
- synaloepha19
- syncarpies19
- topography22
- trichology20
- troopships18
- typographs22
- typologies18
- uroscopies17
- xylographs27
- zygospores26