In Dragon Metrics there are 2 ways you can help on managing your list of keywords:
Whenever you upload a list of keywords to Dragon Metrics, you should group these keywords in closely themed group and create different Keyword Group to store them separately. This doesn't only help on Keyword Management, it helps you utilize your Keyword Credits and get better Competitor data as well. Learn more about Keyword Group here.
Other than using Keyword Group, using Tags for keyword is very important for effective keyword management. By tagging keywords based on keywords common characteristics, you can filter them easily in different pages in Dragon Metrics and able segment your data in more meaningful ways. You can learn more about keyword tagging here.