1. ski trail trail or slope prepared for skiing
  2. Sectral an oral beta blocker used in treating hypertension
  3. sectorial relating to or resembling a sector
  4. suctorial adapted for sucking or clinging by suction
  5. spectral resembling or characteristic of a phantom
  6. safety rail a railing placed alongside a stairway or road for safety
  7. skirl make a shrill, wailing sound
  8. skittishly in a skittish manner
  9. solitarily in solitude
  10. pictorial pertaining to or consisting of pictures
  11. skid road a road made of logs on which freshly cut timber can be hauled
  12. pictural pertaining to or consisting of pictures
  13. skid row a city district frequented by vagrants and addicts
  14. subdural below the dura mater but above the arachnoid membrane of the meninges
  15. Sagittarius a large zodiacal constellation in the southern hemisphere
  16. skittle alley a lane down which a bowling ball is rolled toward pins
  17. central in or near an inner area
  18. kestrel small North American falcon
  19. skitter move about or proceed hurriedly
  20. skittle a bowling pin of the type used in playing ninepins or (in England) skittles

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