激しい口論を英語でなんと言うか？

heated exchange でいいでしょう。exchange には言い争いといういみもありますが、ポイントは heated という形容詞です。0:43 this heated exchange between two commuters was captured on a relatively short journey between Manchester Piccadilly and Preston. この二人の乗客の激しいやり取りはイギリスでの「東京ー横浜間」程度の通勤での出来事だ。

TRAIN FIGHT: Man refuses to let co-passenger out of his seat
https://www.youtube.com/watch?v=fxOblckhbtc  0:17 the argument got heated.
Miramar Man accused of beating and stabbing 79 year old Father-In-Law
https://www.youtube.com/watch?v=ffDkCIQi2j8  0:07 Christie got into a heated exchange Thursday with a law student
Chris Christie in heated exchange
https://www.youtube.com/watch?v=PkXjsB9oK54  0:44 we saw some heated exchanges between government ministers and the opposition.
Greek infrastructure goes on sale as Germany approves €86 bln bailout
https://www.youtube.com/watch?v=nAOsesrCF4c  0:35 a heated debate
Pedestrian Plaza Controversy

参考リンク
http://bridge-english.blogspot.jp/2013/03/blog-post_9.html  舌戦を英語でなんと言うか？