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

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n. A masked or costumed merrymaker, especially at a festival.

n. One who acts or plays in a pantomime.

n. An actor.

n. A person who dons a disguising costume, as for a parade or a festival.

n. An actor in a pantomime; one who communicates entirely through gesture and facial expression.

n. One who mumms, or makes diversion in disguise; a masker; a buffon.

n. One who mums, or masks himself and makes diversion in disguise; a masker; a masked buffoon; specifically, in England, one of a company of persons who go from house to house at Christmas performing a kind of play, the subject being generally St. George and the Dragon, with sundry whimsical adjuncts.

n. an actor who communicates entirely by gesture and facial expression

"Then, summoning the wild courage of despair, a throng of the revellers at once threw themselves into the black apartment, and, seizing the mummer, whose tall figure stood erect and motionless within the shadow of the ebony clock, gasped in unutterable horror at finding the grave-cerements and corpse-like mask which they handled with so violent a rudeness, untenanted by any tangible form."

player    histrion    role player    actor    thespian   

mumchance    mummery   

marcel marceau    Marceau   

masker    Buffon    actor    buffoon    mime   

Starr    sizar    old-fashion    thought    cosmopolite