"Uni-" Vocabulary

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Across
  1. 3. one group
  2. 4. to join together in one group
  3. 5. moving in only one direction
  4. 6. a one-wheeled vehicle on which the rider sits and pedals
  5. 7. one sided
  6. 8. a one-piece leotard and tights combination
Down
  1. 1. an instance of saying the same words or sounds at the same time
  2. 2. One of a kind; unusual, rare
  3. 4. having only one cell
  4. 6. a horse-like fabled animal that has one horn growing out of the middle of its forehead