1 Is The Loneliest Number

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Across
  1. 3. sounded or spoken in a tone unvarying in pitch
  2. 5. a dramatic speech by a single actor
  3. 6. the state of corresponding exactly
  4. 7. the single one of its kind
  5. 8. relating to the sun or utilizing the energies of the sun
Down
  1. 1. a state of social isolation
  2. 2. any activity that is performed alone without assistance
  3. 4. an imaginary horse with a long horn on its forehead
  4. 5. an unchanging intonation
  5. 7. join or combine