1. writer's block an inability to write
  2. retrospect contemplation of things past
  3. ride horseback ride on horseback
  4. breeze block a light concrete building block made with cinder aggregate
  5. tower block tower consisting of a multistoried building of offices or apartments
  6. trap block (American football) an illegal block
  7. reversible capable of being returned to the original condition
  8. winter's bark aromatic bark having tonic and stimulant properties
  9. rudderstock a vertical post at the forward edge of a rudder that enables the rudder to pivot
  10. protrusible capable of being thrust forward, as the tongue
  11. roadblock any condition that makes it difficult to make progress or to achieve an objective
  12. reversibly in a reversible manner
  13. arthrosporic of or relating to arthrospores
  14. reversibility the quality of being reversible in either direction
  15. writer's name the name that appears on the by-line to identify the author of a work
  16. mother's milk milk secreted by a woman who has recently given birth
  17. water supply a facility that provides a source of water
  18. painter's colic symptom of chronic lead poisoning and associated with obstinate constipation
  19. rooter skunk large naked-muzzled skunk with white back and tail
  20. dress blues a dress uniform for formal occasions