strong

strong adjective able, brawny, burly, clear, concentrated, crushing, determined, durable, enduring, energetic, firm, forceful, forcible, formidable, fortis, hard, hardy, harsh, healthy, Herculean, husky, intense, lasting, lusty, manly, mighty, omnipotent, overwhelming, perseverant, persevering, persistent, persuasive, potent, powerful, puissant, reinforced, reliable, rich, robust, robustus, rugged, secure, solid, sound, stalwart, staunch, steadfast, steady, stiff, stout, strapping, strengthful, sturdy, tenacious, titanic, tough, unflimsy, unpliant, unremitting, unyielding, valens, vibrant, vigorous, violent, virile, vivid, well-built, well-made, wiry
Associated concepts: strong case, strong evidence, strong probability

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See also: assertive, categorical, cogent, cohesive, compact, compelling, convincing, disorderly, drastic, durable, firm, forcible, in full force, indomitable, inexpugnable, influential, infrangible, insusceptible, intense, intensive, irresistible, omnipotent, orotund, persuasive, potent, powerful, predominant, prevailing, profound, reliable, resilient, resounding, secure, solid, sound, spartan, stable, staunch, steadfast, substantial, tenable, unyielding, valid, vehement