Nathan Spelling list 16

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Across
  1. 3. exactly like something else, especially through having been copied.
  2. 6. an early type of aircraft with two pairs of wings, one above the other.
  3. 8. simultaneous performance of action or utterance of speech.
  4. 9. a million million
Down
  1. 1. a set or group of three people or things.
  2. 2. a performance by two people, especially singers, instrumentalists, or dancers.
  3. 4. a vehicle similar to a bicycle, but having three wheels, two at the back and one at the front.
  4. 5. the exclusive possession or control of the supply of or trade in a commodity or service.
  5. 7. done, produced, or occurring every two weeks or twice a week.
  6. 8. remaining the same in all cases and at all times; unchanging in form or character.