We Are Safer Together! Can you name the pair?

12345678910111213141516171819
Across
  1. 3. Ketchup
  2. 6. Clark
  3. 7. Butter
  4. 9. Roll
  5. 11. Jelly
  6. 13. That
  7. 16. Luigi
  8. 17. Syrup
  9. 18. Key
  10. 19. Paper
Down
  1. 1. Pop
  2. 2. cheese
  3. 4. Turf
  4. 5. Clyde
  5. 8. Meatballs
  6. 10. Ken
  7. 12. Robin
  8. 13. Jerry
  9. 14. Water
  10. 15. Eggs
  11. 16. Cookies