MONO- one

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Across
  1. 3. a long speech given by one person
  2. 7. an abnormal fear of being the only one there, fear of being alone
  3. 9. a speech in which every word has one tone of voice
  4. 10. a track for subway or train cars that only has one rail
Down
  1. 1. having only one syllable
  2. 2. having one color, a painting, design, photo or outfit that is only one color or shades of one color
  3. 4. control of a product or service by one company
  4. 5. something made out of one single large block or piece of stone, one single stone monument
  5. 6. speaking or writing only one language
  6. 8. an eyeglass for one eye