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Across 1. to lose value or fail suddenly and quickly. 3. to increase suddenly and strongly. 6. to stay at a steady level after a period of growth or progress. 9. to rise quickly to a very high level. 10. to become greater in number, amount or importance than sth else. 12. to suddenly fall in value, quickly and by a large amount 14. to be at a low level and fail to improve or increase. 15. to increase gradually 16. to go, rise, improve, etc. faster than sb/sth

Down 2. to do or be better than sb/sth 4. to rapidly grow or increase in number 5. to be at a low level and fail to improve or increase. 7. to fall rapidly in value or amount. 8. to become greater, worse, more serious, etc.; to make something greater, worse, more serious, etc. 11. to fall suddenly and quickly from a high level or position 13. to become smaller in size or amount, or fewer in number.