The term 'Jet Black' is a color that is very dark and often described as being blacker than black. It is often used to describe the color of certain stones, fabrics, and other materials. The crossword solutions for this term are EBONY (5 letters), EBON (4 letters), ONYX (4 letters), SABLE (5 letters), and INKY (4 letters). EBONY is a hard, black wood from certain tropical trees, EBON is a black variety of jasper, ONYX is a black or dark-colored gemstone, SABLE is a type of dark brown fur, and INKY is a dark black color.