savant syndrome vs slowness

savant syndrome and slowness both are nouns.

Word	Noun	Adjective	Verb	Adverb
savant syndrome	Yes	No	No	No
slowness	Yes	No	No	No

As nouns, slowness is a hypernym of savant syndrome; that is, slowness is a word with a broader meaning than savant syndrome:

savant syndrome: A condition in which a person with a mental disability, such as an autism spectrum disorder, demonstrates profound and prodigious capacities or abilities far in excess of what would be considered normal.
slowness: lack of normal development of intellectual capacities

Other hypernyms of savant syndrome include brilliance, genius, backwardness, mental retardation, retardation, subnormality.

savant syndrome (noun)	slowness (noun)
A condition in which a person with a mental disability, such as an autism spectrum disorder, demonstrates profound and prodigious capacities or abilities far in excess of what would be considered normal.	a rate demonstrating an absence of haste or hurry
	lack of normal development of intellectual capacities
	unskillfulness resulting from a lack of training