contentious -
inclined or showing an inclination to dispute or disagree, even to engage in law suits; "a style described as abrasive and contentious"; "a disputatious lawyer"; "a litigious and acrimonious spirit"
argumentative given to or characterized by argument; "an argumentative discourse"; "argumentative to the point of being cantankerous"; "an intelligent but argumentative child"
contentious -
involving or likely to cause controversy; "a central and contentious element of the book"- Tim W.Ferfuson
controversial marked by or capable of arousing controversy; "the issue of the death penalty is highly controversial"; "Rushdie's controversial book"; "a controversial decision on affirmative action"
