KeywordSpy generously provides business categories in which keywords or competitors belong to. You can drilldown to different categories and see the results that KeywordSpy indexed for a certain domain or keyword.
The KeywordSpy Categories section is a great place to start your market research and reports. It will show you possible competitors, sister sites and related keywords to the site you want to analyze. It is going to help you get a better idea if you want to approach a better strategy in offsetting your competitors so that you can improve your online business.