Unity!

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Across
  1. 3. harmony or accordance in opinion or feeling
  2. 7. opposite of agreement
  3. 8. the state of being united or joined as a whole.
Down
  1. 1. the action or process of integrating.
  2. 2. the 50 states of America are ...?
  3. 4. not united; in disagreement.
  4. 5. a number that starts with the letter o
  5. 6. agreement or concord.