Discussion Board vs. Blog
These are the two definitions of a Discussion Board and Blog.
Discussion Board- Noun, Another word for message board. It is a way to post reading responses and or chat with other students or colleagues within a secure area on the Internet.
Blog- Noun, Another word for a Weblog. Verb- Blogged, Blogging. Add new material or to regularly update a weblog. This is a personal journal that you can update regularly on your own pace and other people can also add responses but is more for personal use.