vocabulary in space

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Across
  1. 2. A phrase or opinion that is overused and betrays a lack of original thought
  2. 4. allowing liquids or gases to pass through
  3. 5. The process of corroding metal, stone, or other materials
  4. 6. extreme tiredness
  5. 8. involving or denoting a speed greater than that of sound.
  6. 12. Of or relating to work performed in space outside a spacecraft
  7. 16. An introduction to something more substantial
  8. 17. A way of dealing with something
  9. 18. Move suddenly and powerfully forward or upward
Down
  1. 1. The ability to do something successfully or efficiently
  2. 2. A Russian astronaut.
  3. 3. Respect and admiration felt for someone or something on the basis of their achievements or quality
  4. 5. a gift or payment to a common fund or collection
  5. 7. enough or more than enough
  6. 9. skill in performing tasks
  7. 10. Throw or drop (something) from an aircraft or ship
  8. 11. just\only
  9. 13. Anxiety or fear that something bad or unpleasant will happen
  10. 14. unwittingly
  11. 15. A defect in the eye or in a lens