slow-wittedness vs dumbness

slow-wittedness and dumbness both are nouns.

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

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

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

Other synonyms of slow-wittedness include denseness.

slow-wittedness (noun)	dumbness (noun)
the quality of being mentally slow and limited	the quality of being mentally slow and limited