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

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n. Anything that treats.

n. A vessel used to treat oil-water emulsions by any of several mechanisms so that the oil can be accepted by the pipeline or transport.

n. One who treats; one who handles, or discourses on, a subject; also, one who entertains.

n. One who treats, in any sense of the word.

n. someone who negotiates (confers with others in order to reach a settlement)

"No age limit on Gwinnett police Taser policy | ajc. com: Last week's use of a Taser stun gun on a handcuffed 14-year-old trick or treater is within Gwinnett County police policy, which has no age provision, police said."

communicator   

negotiatress    bargainer    settler    holdout    representative   

trick-or-treater   

Demeter    Peter    beater    cheater    depleter