How are you adding a bad words list filter as is? Just using the Forbidden Words validation parameters? Those aren't particularly meant for a full bad words filter list since they're per-field and not global list it would result in a lot of duplicate forbidden words output in the HTML.

Since you're wanting to use a database table for the bad words filter list you could use CB Query Field. Like CB Code Field it too provides validation parameters. Specifically Query Validation, which can be used to check a fields value against a database using a custom database query. That'd probably be the easiest approach otherwise it gets a lot more complicated with CB Auto Actions acting on field storage to filter things out.