WORDS or something like that:/

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Across
  1. 4. a person who helps people or institutions
  2. 6. heat again
  3. 8. keep something from happening
  4. 12. a plant consisting of two or more building that have faculties
  5. 13. a very populated city
  6. 16. a device that amplifies your voice
  7. 17. having no intelligible meaning
  8. 18. somebody who manages property for others
  9. 19. a person involved in politics
Down
  1. 1. a person who walks
  2. 2. a account with a amusing incident
  3. 3. a educational institution for children to young for elementary school
  4. 5. go back to a previous state
  5. 6. build again
  6. 7. to disappear and reappear in a different place
  7. 9. a high up view
  8. 10. to plot against somebody
  9. 11. make a prediction about
  10. 14. crowd together to much
  11. 15. to increase vision