Ebon and Onyx

Ebon adjective - Of a very dark black.

Onyx and ebon are semantically related in black topic. In some cases you can use "Onyx" instead an adjective "Ebon", when it comes to topics like dark, colors. popular alternative

Onyx noun - A chalcedony with alternating black and white bands; used in making cameos.

Ebon and onyx are semantically related in black topic. You can use "Ebon" instead an adjective "Onyx", if it concerns topics such as colors.