I thought I was going to be clever as I could see the 2nd page of this thread. It is only the -ed variety of the word in question that upset the filter. So I hit Post Reply - which shows the whole thread which includes the word in question. One locked out thread.
The funniest part was, someone must have been typing in swear words on Google as that was locked out as well!
Anyway, I home now so I can thank you all for your kind words on this thread.