Prefix co- and con-



Across
2. Incidences that happen together or at the same time
5. Talking with people
6. A person that someone works with
7. Exist together
9. Gather things together
10. Build things by putting them together
11. Flatten by pressing together
   
Down
1. A place where students learn together
3. Operate with another person
4. Having a conflict with someone
7. When people or cars bump into each other or come together
8. Putting multiple things together