I tried to enter "Lucifer" in the BWS, but it wouldn't accept it--it looks up a similar word (Lucius) if using a new guide or reverts to the last word entered if using an existing guide. I find this extremely frustrating.
On the other hand, if I right-click on the word in any resource, I can run a BWS on Lucifer (or any other word) without restriction. I just did a BWS on "Marcion" via the right-click, but that word is also rejected if I try to enter it directly. The BWS is useful for checking dictionary entries on any kind of word, not just "Bible Words". (Although Lucifer is a "bible word"-- Is 14:12 KJV )
Why is the BWS entry field restricted? I can't think of any good reason.