The Ologies that don't exist... or maybe they do?

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Across
  1. 4. The study of tables
  2. 11. The study of labs
  3. 14. The study of this crossword
  4. 15. The study of simple things
  5. 17. The study of walking
  6. 19. The study of chairs
  7. 21. The study of shoes
  8. 22. The study of studying things
  9. 23. The study of things
  10. 24. The study of crosswords
  11. 25. The study of keyboards
  12. 26. The study of lists
  13. 30. The study of single things
Down
  1. 1. The study of the avengers
  2. 2. The study of long words
  3. 3. The study of printing things
  4. 5. The study of easy things
  5. 6. The study of Reddit
  6. 7. The study of hard things
  7. 8. The study of Chris Bonvissuto
  8. 9. The study of plumbing
  9. 10. The study of swimming
  10. 12. The study of Dell
  11. 13. The study of signing up
  12. 16. The study of logging in
  13. 18. The study of laundry
  14. 20. The study of ads
  15. 27. The study of building things
  16. 28. The study of bricks
  17. 29. The study of Quora