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

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adj. Having or capable of exerting power.

adj. Effective or potent: a powerful drug.

adj. Chiefly Upper Southern U.S. Great: "[Everybody had] a powerful lot to say about faith and good works and free grace and preforeordestination, and I don't know what all” ( Mark Twain).

ad. Chiefly Upper Southern U.S. Very: It was powerful humid.

adj. Having, or capable of exerting power, potency or influence.

adj. Large; capacious; said of veins of ore.

adj. Full of power; capable of producing great effects of any kind; potent; mighty; efficacious; intense

adj. Large; capacious; -- said of veins of ore.

Exerting great force or power; able to produce great physical effects; strong; efficient: as, a powerful engine; a powerful blow; a powerful medicine.

Having great authority; puissant; potent; mighty: as, a powerful nation.

Characterized by great intellectual power.

Having great influence or moral power; cogent; efficacious.

Great; numerous; numerically large. Compare power, 10.

Synonyms Puissant, forcible, cogent, influential; vigorous, robust, sturdy.

Very: as, powerful good; powerful weak.

adj. having great power or force or potency or effect

adj. strong enough to knock down or overwhelm

adj. having great influence

adj. (of a person) possessing physical strength and weight; rugged and powerful

adj. displaying superhuman strength or power

ad. (Southern regional intensive) very; to a great degree

"Tyler Sudley would break out, addressing the teacher, all unmindful of scholastic etiquette, a flush of pleasure rising to his swarthy cheek as he thrust back his wide black hat on his long dark hair and turned his candid gray eyes, all aglow, upon the cadaverous, ascetic preceptor, "ain't Lee-yander a-gittin 'on powerful, _powerful_ fas' with his book?""

potent    puissant    ruling    muscular    regnant    all-powerful    almighty    coercive    regent    strong   

powerless   

able    forcible    influential    cogent   

efficacious    potent    forcible    strong    mighty    intense    energetic    large    capacious   

strong    new    mighty    effective