Cobalt is a chemical element with the symbol Co and atomic number 27. The crossword solutions for the term cobalt include BLUE (4 letters), ISOTOPE (7 letters), AZURE (5 letters), SMALT (5 letters), ISOTOPES (8 letters), CAR (3 letters), ZAIRE (5 letters), METAL (5 letters), and DEEPBLUE (8 letters). BLUE, AZURE, and deepblue are all shades of BLUE, while smalt is a type of BLUE pigment. Isotope and isotopes refer to the different forms of cobalt that have different numbers of neutrons in their nucleus. CAR and ZAIRE are both countries where cobalt is mined, and METAL is a general term for the category of elements that cobalt belongs to.