"Uni" Crossword

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Across
  1. 3. one group
  2. 4. to join together into one group
  3. 5. moving in only one direction
  4. 6. a one wheeled vehicle on which the rider sits/pedals
  5. 7. one sided
  6. 8. a one pieced leotard and tights combination
Down
  1. 1. an instance of saying the same words at the same time
  2. 2. one of a kind; unusual or rare
  3. 4. having only one cell
  4. 6. a horse like fabled animal with a horn on forehead