List of vigorous synonyms and vigorous related words.
ablaze, acid, active, acute, afire, aggressive, animated, ardent, armipotent, athletic, authoritative, balmy, beefy, biting, blooming, blossoming, boiling over, booming, bouncing, breathless, brisk, burning, cartilaginous, chewy, clear, cogent, cohesive, cordial, coriaceous, corrosive, cutting, dashing, delirious, doughty, driving, drunk, durable, dynamic, effective, energetic, enterprising, enthusiastic, excited, exuberant, fair, fat, febrile, fervent, fervid, fevered, feverish, fibrous, fiery, fit, flaming, flourishing, flowering, flush, flushed, forceful, forcible, forcy, fruiting, full of beans, full of pep, full-blooded, full-strength, glowing, go-go, going strong, gristly, gutsy, gutty, halcyon, hale, hale and hearty, hard, hard as nails, hard-hitting, hardy, healthy, hearty, heated, hefty, high-potency, high-powered, high-pressure, high-tension, hot, husky, impassioned, imperative, impetuous, impressive, in force, in full swing, in good case, in power, incisive, intense, intoxicated, iron-hard, irresistible, keen, kinetic, lasting, leatherlike, leathery, lively, living, lusty, masterful, mettlesome, mighty, mighty in battle, mordant, muscular, nervous, nervy, obstinate, on fire, operative, palmy, passionate, penetrating, peppy, piercing, piping, poignant, potent, powerful, prepotent, prospering, proud, puissant, punchy, red-blooded, red-hot, resilient, resistant, robust, robustious, robustuous, ropy, rosy, rough-and-ready, rude, rugged, ruling, sensational, sinewed, sinewy, slashing, sleek, smacking, snappy, spanking, spirited, sprightly, spry, stalwart, steaming, steamy, steely, stiff, stout, strapping, strenuous, striking, stringy, strong, strong as brandy, strong as strong, strong-willed, stubborn, sturdy, take-charge, take-over, telling, tenacious, thriving, tough, tough as leather, trenchant, unrestrained, untiring, valid, vibrant, vigil, viscid, vital, vivacious, vivid, warm, wiry, zealous, zestful, zesty, zippy