Silent Letters

12345678
Across
  1. 3. a vessel used for private cruising
  2. 4. to appease or pacify
  3. 7. the complete central structure to which the wing
  4. 8. quantity or amount equal to such a part
Down
  1. 1. keenly watchful to detect danger
  2. 2. the artificial reduction of body temperature to slow metabolic processes
  3. 5. a vessel used for private cruising
  4. 6. baby of a domestic cow