uni

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Across
  1. 1. one of a kind
  2. 2. to join into one group
  3. 4. moving in one direction
  4. 6. one wheel bike
  5. 7. a horse-like animal with a horn
Down
  1. 1. a one piece leotard and tights
  2. 2. a group that sounds like one
  3. 3. one sided
  4. 4. having only one cell
  5. 5. one group