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

• Lexulous
• Wordscraper
• Wordosaur

v. Present participle of vituperate.

"At the start of the show, as they're vituperating at opposite ends of the stage, it's hard to imagine why these two married each other—until about 15 minutes in, when suddenly she's straddling his lap and their union becomes more explainable."

vituperated    vituperates    vituperating   

abuse    clapperclaw    blackguard    shout   

vituperatory    vituperous    vituperant    vituperable    vituperator   

scold    rate    abuse    revile    denounce