Formal:
* Multifaceted: This suggests a topic with many different aspects or dimensions.
* Multidisciplinary: This emphasizes the involvement of multiple academic fields.
* Comprehensive: This implies covering a wide range of topics.
* Diverse: This highlights the variety and differences among the subjects.
* Extensive: This emphasizes the large number of subjects covered.
Informal:
* A lot of stuff: This is a casual way to say there are many subjects.
* Tons of topics: This emphasizes a large quantity of subjects.
* A broad range: This emphasizes the diversity of the subjects.
* A wide variety: Similar to "broad range," emphasizing the differences among subjects.
Specific:
* Multiple subjects: This is a more specific way to say "many subjects."
* Several subjects: This suggests a smaller number of subjects than "many."
* Numerous subjects: This implies a very large number of subjects.
The best word to use depends on the specific context and the level of formality desired.