Full of power; capable of producing great effects of any kind; potent; mighty; efficacious; intense; as, a powerful man or beast; a powerful engine; a powerful argument; a powerful light; a powerful vessel.

having great power or force or potency or effect; "the most powerful government in western Europe"; "his powerful arms"; "a powerful bomb"; "the horse's powerful kick"; "powerful drugs"; "a powerful argument"

having the power to influence or convince; "a cogent analysis of the problem"; "potent arguments"

Powerful describes a wine with lots of very easy to discern flavour and alcohol.

Does lots of things.

robust wine with powerful qualities, rich in alcohol and tannins e.g. Pauillac, Cotes-du-Rhone, certain Spanish and Italian reds

(of a person) possessing physical strength and weight; rugged and powerful; "a hefty athlete"; "a muscular boxer"; "powerful arms"

displaying superhuman strength or power; "herculean exertions"

Close to being a synonym for BRAWNY.

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

Strong