beefy bouncing bulldoggish doughty dynamic energetic forceful forcible forcy full-blooded full-strength game gamy gritty gutsy gutty hale hard hard as nails hardy hearty hefty husky iron-hard lusty mettlesome mighty nervy obstinate pertinacious plucky potent powerful puissant resolute robust robustious rugged spirited spiritful spunky stalwart steely stout strapping strenuous strong strong as brandy strong as strong strong-willed sturdy tenacious tough vigorous vital