When you are posting Ambigrams to the AmbiGallery, you should try to use tags that other folks have used.  That will make it easy to sort the ambigrams based on their attributes.  Due to the sorting mechanism, I have had to use a few specific tags and I will display them here:

180degrees : note that there is no space -- this is on purpose, because otherwise it would break up 180 and degrees into 2 tags

asymmetric - notice I did NOT put "al" on the end

symmetrical - notice that this one DOES have "al" on the end

Adding the "al" to the above tag keeps it from overlapping with asymmetric.

Hope this helps, and let me know if you need any clarification!

=Dave

http://www.AmbigraManiA.com

Founder of the oldest Ambigram site on the Internet