Alien Invasion's rich vocabulary

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Across
  1. 2. To throw with great force.
  2. 3. A ringing sound.
  3. 6. To move quickly, suddenly.
  4. 8. To turn quickly.
  5. 10. A group or similar things.
  6. 11. To take a brief look.
  7. 13. A light that is not shinning brightly or clearly.
  8. 16. To look steadily, intently.
  9. 17. The remains of something damaged or destroyed.
  10. 18. An act of running somewhere suddently.
  11. 19. Full of activity.
Down
  1. 1. The thigh grip or grasp of something.
  2. 2. To hang in the air.
  3. 4. Having parts that fit together perfectly.
  4. 5. To move or cause to move from a place to another.
  5. 7. To arrive or leave angrily.
  6. 9. Lacking a label or tag on it.
  7. 12. To crouch down in fear.
  8. 14. In poor condition and lack of care.
  9. 15. In an unwilling an hesitant way.