Sydenham's chorea vs chorea

Sydenham's chorea and chorea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sydenham's chorea	Yes	No	No	No
chorea	Yes	No	No	No

As nouns, chorea is a hypernym of Sydenham's chorea; that is, chorea is a word with a broader meaning than Sydenham's chorea:

Sydenham's chorea: chorea occurring chiefly in children and associated with rheumatic fever
chorea: any of several degenerative nervous disorders characterized by spasmodic movements of the body and limbs

Sydenham's chorea (noun)	chorea (noun)
chorea occurring chiefly in children and associated with rheumatic fever	any of several degenerative nervous disorders characterized by spasmodic movements of the body and limbs
	chorea in dogs