Hi @BTRedman ...
I had to search Seminole County Public Schools for information on Ecampus. I found that they choose to refer to Canvas as eCampus. With that being said, yes, there are some third-party external tools available that integrate with Canvas which could display crossword puzzles in Canvas. Some third-party tools most likely have some sort of cost or subscription plan, but there might be some that are free. It just depends on the kind of tool that you want to integrate. You'd want to have a conversation with your school's Canvas administrator to see if purchasing and/or integrating these would be a possibility.
- H5P - I've tried creating a crossword puzzle in H5P, and it even grades using the Canvas Gradebook
- Educaplay (EduAppCenter)
- Puzzel.org (EduAppCenter)
There might be other tools available that other folks here in the Community use or know about, so I'll let them chime in as well.
I hope this will be helpful and give you some ideas of where you might be able to start. Good luck!