Antonyms of adj argumentative

1 sense of argumentative

Sense 1
argumentative (vs. unargumentative) -- (given to or characterized by argument; "an argumentative discourse"; "argumentative to the point of being cantankerous"; "an intelligent but argumentative child")

unargumentative (vs. argumentative) -- (not given to or characterized by argument)
        => noncontentious -- (of persons; not given to controversy)

Similarity of adj argumentative

1 sense of argumentative

Sense 1
argumentative (vs. unargumentative) -- (given to or characterized by argument; "an argumentative discourse"; "argumentative to the point of being cantankerous"; "an intelligent but argumentative child")
       => quarrelsome -- (given to quarreling; "arguing children"; "quarrelsome when drinking")
       => contentious, combative, disputatious, disputative, litigious -- (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")
       => eristic, eristical -- (given to disputation for its own sake and often employing specious arguments)