Synonyms and related words :
active, acute, aggressive, animated, brisk, dynamic, electrodynamic, energetic, enterprising, enthusiastic, forceful, forcible, full of pep, geodynamic, go-go, hearty, impetuous, incisive, intense, keen, kinematic, lively, living, lusty, mettlesome, peppy, radiodynamic, robust, smacking, snappy, spanking, spirited, strenuous, strong, take-charge, take-over, trenchant, vibrant, vigorous, vivacious, vivid, zestful, zesty, zippy