inkiness vs blackness

inkiness and blackness both are nouns.

Word	Noun	Adjective	Verb	Adverb
inkiness	Yes	No	No	No
blackness	Yes	No	No	No

As nouns, inkiness and blackness are synonyms defined as:

inkiness and blackness: the quality or state of the achromatic color of least lightness (bearing the least resemblance to white)

Other synonyms of inkiness include black.

inkiness (noun)	blackness (noun)
the quality or state of the achromatic color of least lightness (bearing the least resemblance to white)	the quality or state of the achromatic color of least lightness (bearing the least resemblance to white)
	total absence of light