Pro's counterpart (3)
(Other definitions for con that I've seen before include "Swindle or trick someone" , "Tory" , "Study - swindle" , "Direct steering; study" , "Dupe" .)
(Other definitions for anti that I've seen before include "Naysayer" , "Opposed to followers of Hitler" , "An opponent - opposed to party policy, etc" , "Definitely not pro" , "Negative vote" .)