Pow"er*ful*ly

Powerful \Pow"er*ful\, a.
   1. 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.
      [1913 Webster]

            The powerful grace that lies
            In herbs, plants, stones, and their true qualities.
                                                  --Shak.
      [1913 Webster]

   2. (Mining) Large; capacious; -- said of veins of ore.
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   Syn: Mighty; strong; potent; forcible; efficacious;
        energetic; intense.
        [1913 Webster] -- {Pow"er*ful*ly}, adv. --
        {Pow"er*ful*ness}, n.
        [1913 Webster]
    

84 Moby Thesaurus words for "powerfully":
      almighty, ardently, authoritatively, awfully, cogently,
      commandingly, consequentially, deafeningly, dynamically,
      effectively, effectually, eloquently, energetically, ex cathedra,
      exceedingly, expressively, fervently, firmly, fluently, forcefully,
      forcibly, glibly, glowingly, graphically, hardly, heartily,
      imperatively, imperviously, impregnably, impressively,
      in glowing terms, intensely, invincibly, invulnerably,
      irresistibly, just, loudly, lustily, meaningfully, might and main,
      mightily, mighty, momentously, officially, only too, passionately,
      potently, powerful, pretty, productively, puissantly, pungently,
      quite, real, really, resistantly, right, robustly, ruggedly,
      smoothly, so, soundly, spiritedly, stalwartly, staunchly, stoutly,
      strikingly, strongly, sturdily, tellingly, terribly, terrifically,
      to good account, to good purpose, unyieldingly, vehemently, very,
      vigorously, vividly, warmly, weightily, with a vengeance,
      with authority, with telling effect