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

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v. Present participle of powwow.

"The treatment, called powwowing, consisted of repeating long lists of words that she had learned from a book called "The Black Arts.""

powwowed    powwowing    powwows   

hash out    discuss    talk over    council    group discussion   

parley   

scorning    tie-dye    sliding scale    stage whisper    totem