1. a treatise advancing a new point of view resulting from research; usually a requirement for an advanced academic degree

2. the set of elements common to two or more sets

3. land and the buildings on it

4. assign a rank or rating to

8. severe and unremitting in making demands

10. the direction or path along which something moves or along which it lies

5. a university in Massachusetts

6. a social or business visitor

7. someone who pays for goods or services

9. processing a photosensitive material in order to make an image visible

11. a creation (a new device or process) resulting from study and experimentation

12. performance of duties or provision of space and equipment helpful to others