The term 'Black as ___' can be completed with the crossword solutions PITCH (5 letters), EBON (4 letters), JET (3 letters), INKY (4 letters), and EBONY (5 letters). PITCH is a dark, tar-like substance that is used for waterproofing and sealing. EBON is an archaic word for black, derived from the Latin word for black. JET is a type of black gemstone, often used in jewelry. INKY is an informal term for black, usually referring to the color of ink. EBONY is a type of hardwood that is black in color.