1. Controversial Adjective
Marked by or capable of arousing controversy.
The issue of the death penalty is highly controversial.
Contentious - involving or likely to cause controversy.
Capable - (usually followed by `of') having capacity or ability; "capable of winning".
Arguing, Argument, Contention, Contestation, Controversy, Disceptation, Disputation, Tilt - a contentious speech act; a dispute where there is strong disagreement; "What controversy is going on here?".