denseness vs slow-wittedness

denseness and slow-wittedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
denseness	Yes	No	No	No
slow-wittedness	Yes	No	No	No

As nouns, denseness and slow-wittedness are synonyms defined as:

denseness and slow-wittedness: the quality of being mentally slow and limited

Other synonyms of denseness include dumbness.

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