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 killer; as, Jack the Giant Queller.

n. One who quells; one who overpowers or subdues.

n. A killer.

n. One who quells; one who overpowers or subdues.

n. One who quells or kills; a slayer.

n. One who subdues or crushes.

"Pantocyclus — the illustrious Circle mentioned above, as the queller of the Colour Revolt — who first convinced mankind that Configuration makes the man; that if, for example, you are born an Isosceles with two uneven sides, you will assuredly go wrong unless you have them made even — for which purpose you must go to the Isosceles Hospital; similarly, if you are"

killer   

tenaciousness    merwoman    odiousness    torc    assuredness    armado    enemy    car-warrior    luxuriousness    girlishness