Vigor1. (n.) Active strength or force of body or mind; capacity for exertion, physically, intellectually, or morally; force; energy.
2. (n.) Strength or force in animal or force in animal or vegetable nature or action; as, a plant grows with vigor.
3. (n.) Strength; efficacy; potency.
4. (v. t.) To invigorate.
Thesaurus Entries
amperage, animal spirits, animation, armipotence, authority, bang, beef, bite, bitingness, black power, bounce, brio, briskness, brute force, capacity, capersomeness, charge, charisma, clout, cogence, cogency, coltishness, compulsion, cuttingness, decisiveness, demonic energy, dint, drive, duress, dynamism, eagerness, effect, effectiveness, effectuality, elan, endurance, energy, enthusiasm, ergal, esprit, exuberance, flower power, force, force majeure, forcefulness, fortitude, friskiness, frolicsomeness, full blast, full force, gaiety, gamesomeness, gayness, get-up-and-go, getup, go, gusto, guts, gutsiness, haleness, hardiness, healthiness, heartiness, impressiveness, incisiveness, influence, intensity, intestinal fortitude, kinetic energy, life, liveliness, longevity, lustihood, lustiness, main force, main strength, mana, manliness, mettle, mettlesomeness, might, might and main, mightiness, mordancy, moxie, muscle, muscle power, muscularity, nervosity, nervousness, obstinacy, oomph, pep, piss and vinegar, pith, pizzazz, playfulness, poignancy, poop, potence, potency, potential energy, potentiality, power, power pack, power structure, power struggle, powerfulness, prepotency, productiveness, productivity, puissance, pull, punch, push, resilience, robustness, rollicksomeness, rompishness, ruggedness, sinew, sinewiness, skittishness, snap, soundness, spirit, spiritedness, spirits, sportiveness, sprightliness, spunk, stalwartness, stamina, starch, staying power, steam, sticking power, stoutness, strength, strength of will, strenuousness, strong arm, strong language, sturdiness, superiority, superpower, toughness, trenchancy, validity, vehemence, verve, vigorousness, vim, virility, virtue, virulence, vitality, vivacity, wattage, weight, zealousness, zest, zestfulness, zing, zip