Numeral morphemes

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123456789101112131415161718
Across
  1. 2. A mythical animal with one horn
  2. 4. A speech by one person
  3. 6. A month whose name includes seven
  4. 8. A shape with 10 sides
  5. 9. A shape with 8 sides
  6. 12. A person who speaks 2 languages
  7. 13. A shape with 6 sides
  8. 14. A group of 3 babies born at the same time
  9. 15. A stand with 3 legs
  10. 17. A cycle with 1 wheel
  11. 18. A vehicle with 2 wheels
Down
  1. 1. A shape with 3 sides
  2. 3. A shape with 4 sides
  3. 5. A shape with 7 sides
  4. 7. A situation where one person controls everything
  5. 10. A musical group of 5
  6. 11. A competition with 5 events
  7. 16. A musical group of 2