absorbance vs density

absorbance and density both are nouns.

Word	Noun	Adjective	Verb	Adverb
absorbance	Yes	No	No	No
density	Yes	No	No	No

As nouns, density is a hypernym of absorbance; that is, density is a word with a broader meaning than absorbance:

absorbance: (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
density: the amount per unit size

Other hypernyms of absorbance include denseness.

absorbance (noun)	density (noun)
(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation	the amount per unit size
	the spatial property of being crowded together