This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

verb-intransitive. To write or deliver an argument; engage in disputation or controversy.

v. To engage in argument.

v. engage in a controversy

"There are exceptions, of course, and you can see those anchors squirm as the new journalists wax, rant and polemicize."

polemicizing   

altercate    dispute    scrap    argufy    quarrel