Across
- 3. an airplane with two pairs of wings
- 5. an instance of saying the same words or sounds at the same time; a group that sounds like one
- 7. one sided
- 8. one group
- 9. happening every two weeks
Down
- 1. able to speak two different languages
- 2. to join together into one group
- 4. happening every two months
- 6. a two-footed creature
- 8. a one-piece leotard and tights combination