WordNet sense 1 (the first known nerve agent, synthesized by German chemists in 1936; a highly toxic combustible liquid that is soluble in organic solvents and is used as a nerve gas in chemical warfare):

tabun

WordNet sense 2 (a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores):

gallium

WordNet sense 3 (a state in southeastern United States; one of the Confederate states during the American Civil War):

Georgia, Empire State of the South, Peach State