ADJECTIVEloyal, reliable, and hardworking: "he remained a stalwart supporter of the cause"synonyms: staunch · loyal · faithful · committed · devoted · dedicated · dependable · reliable · steady · constant · trusty · solid · hard-working · steadfast · redoubtable · unwaveringantonyms: disloyal · unfaithful · unreliabledatedstrongly built and sturdy: "he was of stalwart build"NOUNstalwarts (plural noun)a loyal, reliable, and hardworking supporter or participant in an organization or team: "the stalwarts of the Ladies' Auxiliary" Hope this helps