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

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v. Simple past tense and past participle of rampage.

"Things went wrong in Philadelphia after a hundred-plus people "rampaged" through a Macy's department store, causing about $700 in damage and ending in a "massive snowball fight" (GASP!)."

rampaged    rampages    rampaging   

rampant    ramp   

go on the rampage   

rage    rush    go   

psychopath    maniac    spree