dumbness vs denseness

dumbness and denseness both are nouns.

Word	Noun	Adjective	Verb	Adverb
dumbness	Yes	No	No	No
denseness	Yes	No	No	No

As nouns, dumbness and denseness are synonyms defined as:

Other synonyms of dumbness include slow-wittedness.

dumbness (noun)	denseness (noun)
the quality of being mentally slow and limited	the amount per unit size
	the spatial property of being crowded together
	the quality of being mentally slow and limited