Across
- 2. having or showing great effort or energy
- 4. Opposite of horizontal
- 6. the force that gives something its vitality or strength
- 9. free from social conventions or traditional ideas
- 11. impossible to stop or prevent
- 13. stunts performed in flight by an airplane
- 14. flying or rising high in the air
- 15. pleasant or attractive
- 16. a thing that blocks one's way or prevents or hinders progress
Down
- 1. physically strong, fit, and active
- 3. difficult to believe
- 5. holding or catching the attention
- 7. showing or involving great activity or vitality
- 8. having a shape which reduces the drag from air moving past
- 10. active at night
- 12. quick to notice or perceive things