在雅思口语中，可以使用以下词汇来替换 "many"，以增加表达的多样性和丰富性：

1. Numerous

2. A lot of

3. A great number of

4. A host of

5. A slew of

6. Substantial

7. An abundance of

8. A sea of

9. Quantities of

10. Masses of

11. A multitude of

12. A great deal of

13. An array of

14. Scores of

15. A large/enormous/significant number of

16. Considerable/vast/enormous/incredible amounts of

使用这些词汇时，请根据上下文选择合适的词汇，以确保表达清晰且符合雅思口语考试的评分标准