The term SILVER-WHITE METAL can be solved by the 6 letter word BARIUM. BARIUM is a chemical element with the symbol Ba and atomic number 56. It is a soft, silvery-white alkaline earth metal. BARIUM is never found in nature as a free element due to its reactivity. It is found in ores such as baryte, celestine, anglesite, and barite. BARIUM has many uses, including in the production of vacuum tubes, rat poison, fireworks, and X-ray shielding.