1) Argumentative 2) Contentious 3) Contradictious 4) Controversial 5) Disputative 6) Eristic 1) Argumentative 2) Contentious 3) Disputative 4) Litigious 
• (a.) Inclined to dispute; apt to civil or controvert; characterized by dispute; as, a disputatious person or temper.
Dis`pu·ta'tious adjective Inclined to dispute; apt to civil or controvert; characterized by dispute; as, a disputatious person or temper. « The Christian doctrine of a future life was no recommendation of the new religion to the wits and philosophers of that disputations period.�...
disputatious 1. Inclined or showing an inclination to dispute or disagree, even to engage in law suits. 2. A tendency to argue or disagree without adequate cause. 3. Being fond of, or given to, disputation; argumentative; contentious.
fond of or given to disputation; argumentative; contentious: disputatious litigants.