Dun and Lightless

Dun adjective - Of a dull greyish brown to brownish grey color.

Lightless and dun are semantically related in lack of light topic. In some cases you can use "Lightless" instead an adjective "Dun".

Lightless adjective - Being without light or without much light.

Dun and lightless are semantically related in lack of light topic. Sometimes you can use "Dun" instead an adjective "Lightless".