Unit 4 Word Forms

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Across
  1. 4. gerund form of endure
  2. 6. noun form of happy
  3. 9. adverb form of extreme
  4. 10. verb form of threat
  5. 12. noun form of combine
  6. 13. verb form of population
Down
  1. 1. noun form of disagree
  2. 2. adjective form of efficiency
  3. 3. adjective form of use
  4. 5. adverb form of quick
  5. 7. verb form of apology
  6. 8. adjective form of mechanic
  7. 11. adjective form of nature