All words are nouns!

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Across
  1. 1. beautiful handwriting
  2. 4. a musical work that has been created
  3. 5. living places provided for public convenience
  4. 8. a statement that represents something in words
  5. 9. an exploration into unfamiliar or questionable activities
  6. 10. the act of forming something
Down
  1. 2. an expression of gratitude
  2. 3. relation based on similarities and differences
  3. 6. a society in an advanced state of social development (e.g., with complex legal and political and religious organizations)
  4. 7. a remarkable development