I am not the best person to give advice...just a parent who's child took the 11+ in 2005.
There has been good recommendation for the vocab builder cd
http://www.elevenplusexams.co.uk/cd/the ... lume-1.php
Also there is a list of words on this site.....
http://www.elevenplusexams.co.uk/revisi ... wnload.php
There is quite a few different free downloads... scroll down the list and see if any can help
If you look at the 11+ download from Patricia
it introduces a list of important words for 11+
Hope this helps