savant syndrome vs genius

savant syndrome and genius both are nouns.

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

As nouns, genius is a hypernym of savant syndrome; that is, genius 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.
genius: unusual mental ability

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

savant syndrome (noun)	genius (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.	exceptional creative ability
	a natural talent
	unusual mental ability
	someone who has exceptional intellectual ability and originality
	someone who is dazzlingly skilled in any field