duskiness vs darkness

duskiness and darkness both are nouns.

Word	Noun	Adjective	Verb	Adverb
duskiness	Yes	No	No	No
darkness	Yes	No	No	No

As nouns, duskiness and darkness are synonyms defined as:

Other synonyms of duskiness include swarthiness.

duskiness (noun)	darkness (noun)
a swarthy complexion	a swarthy complexion
the state of being poorly illuminated	having a dark or somber color
	an unenlightened state
	an unilluminated area
	absence of light or illumination
	absence of moral or spiritual values