inkiness vs ebony

inkiness and ebony both are nouns.

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

As nouns, ebony is a hyponym of inkiness; that is, ebony is a word with a more specific, narrower meaning than inkiness:

inkiness: the quality or state of the achromatic color of least lightness (bearing the least resemblance to white)
ebony: a very dark black

Other hyponyms of inkiness include coal black, jet black, pitch black, sable, soot black.

inkiness (noun)	ebony (noun)
the quality or state of the achromatic color of least lightness (bearing the least resemblance to white)	a very dark black
	tropical tree of southern Asia having hard dark-colored heartwood used in cabinetwork
	hard dark-colored heartwood of the ebony tree; used in cabinetwork and for piano keys

inkiness (adjective)	ebony (adjective)
	of a very dark black