R-Controlled Vowels

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Across
  1. 3. Tree with a smooth outer bark
  2. 5. A person who works a machine
  3. 10. Method of healing treatment
  4. 12. To gain knowledge by instruction
  5. 14. Short, sharp sounds of birds
  6. 15. To study to discover facts; search carefully
  7. 16. Strong or firm
  8. 17. A container inside which heat is produced to warm a building or melt metals
  9. 19. Number between twelve and fourteen
  10. 20. Highly excitable or uneasy
  11. 21. A helpful act
  12. 23. Short, colorful expressions
  13. 24. To twist the body
Down
  1. 1. The words of a language; alphabetized list of words and their definitions
  2. 2. Troubled or unsettled
  3. 4. To cause attention or interest
  4. 6. Shaking of the earth's crust
  5. 7. Focusing one's thoughts
  6. 8. Writing or speaking easily
  7. 9. Soon after the start of something
  8. 11. Needing moisture or drink
  9. 13. Stopped in the middle
  10. 18. Pressed, pushed, or persuaded
  11. 22. Serious in purpose