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Across
  1. 4. great admiration or devotion shown towards a person
  2. 6. a glass building in where plants grow
  3. 7. equivalent in value to the sum or item specified
  4. 9. the people engaged in or available for work
  5. 10. the earth
  6. 11. state of being unimportant and useless
  7. 13. having no real value or use
  8. 14. the weather conditions prevailing in an area over a long time
  9. 15. an oxide containing two atoms of oxygen
  10. 17. reaching a high or the highest degree
  11. 19. less good or desirable
  12. 20. an employee
Down
  1. 1. chemical element
  2. 2. a device containing gunpowder and other combustible chemicals
  3. 3. the degree of skill with which a product is made or a job done
  4. 5. the quality of being experienced and sophisticated
  5. 7. able to be worked, fashioned or manipulated
  6. 8. of the poorest quality or lowest standard
  7. 10. a paper listing questions or tasks for students
  8. 12. extending or reaching throughout the world
  9. 16. the state of the atmosphere at a particular place and time
  10. 18. a single distinct meaningful element of speech or writing
  11. 19. having or showing the qualities that deserve the specified action or regard
  12. 20. creeping or burrowing invertebrate animal with a long, slender body