uni-

12345678
Across
  1. 2. one group
  2. 4. saying the same words at the same time; a group that sounds like one
  3. 5. to join together into one group
  4. 6. moving in only one direction
  5. 7. having only one cell
Down
  1. 1. a horse-like fabled animal that has one horn in the middle of its forehead
  2. 2. a one-wheeled vehicle with a seat and pedals
  3. 3. one of a kind; unusual or rare
  4. 5. a one-piece leotard and tights combination
  5. 8. one sided