Jackie posted a good site yesterday on the cliche thread. There was a link there for autoantonyms, which we have referred to here in the past as contronyms.

Here is the group of autoantonyms/contronyms listed on the site, a nice list to have at hand:

autoanytonyms
contranyms
contronyms
antilogies
Janus words
enantiodromes

I don't know how many of these we've used here, but I did recognize contronyms.