inventions are

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Across
  1. 3. it's the work of a genius mind
  2. 5. able to be carried out, doable
  3. 8. will bring about profits
  4. 10. transforms everything
  5. 11. working well and without producing waste
  6. 12. not making any sense, meaningless
  7. 13. will not work in practice
  8. 15. I can't see any use of it
Down
  1. 1. able to succeed or to live!
  2. 2. it can sell well on the market!
  3. 4. a completely new idea
  4. 6. a waste of money
  5. 7. highly intelligent
  6. 9. so stupid that it makes you laugh
  7. 14. very intelligent, bright