74
1. optimist 2. complement 3. mameluke 4. Linnæan 5. infringement 6. gratefully 7. archipelago 8. collision 9. inducement 10. exaction 11. lethargy 12. discursive 13. complementary 14. complimentary 15. maltreat 16. opprobrious 17. prismatic 18. retribution 19. discretionary 20. skilful 21. tasselled 22. colloquy 23. twelfth 24. retrocession 25. volcanoes 26. privilege 27. optional 28. marchioness 29. exaltation 30. loquacious