dark vs lightness

dark and lightness both are nouns.

Word	Noun	Adjective	Verb	Adverb
dark	Yes	Yes	No	No
lightness	Yes	No	No	No

dark (noun)	lightness (noun)
an unenlightened state	the trait of being lighthearted and frivolous
an unilluminated area	the visual effect of illumination on objects or scenes as created in pictures
absence of light or illumination	the property of being comparatively small in weight
absence of moral or spiritual values	having a light color
the time after sunset and before sunrise while it is dark outside	the gracefulness of a person or animal that is quick and nimble
	a feeling of joy and pride

dark (adjective)	lightness (adjective)
devoid of or deficient in light or brightness; shadowed or black
(used of color) having a dark hue
brunet (used of hair or skin or eyes)
secret
causing dejection
stemming from evil characteristics or forces; wicked or dishonorable
showing a brooding ill humor
not giving performances; closed
marked by difficulty of style or expression
lacking enlightenment or knowledge or culture