attention deficit hyperactivity disorder vs hyperkinetic syndrome

attention deficit hyperactivity disorder and hyperkinetic syndrome both are nouns.

Word	Noun	Adjective	Verb	Adverb
attention deficit hyperactivity disorder	Yes	No	No	No
hyperkinetic syndrome	Yes	No	No	No

As nouns, attention deficit hyperactivity disorder and hyperkinetic syndrome are synonyms defined as:

attention deficit hyperactivity disorder and hyperkinetic syndrome: a condition (mostly in boys) characterized by behavioral and learning disorders

Other synonyms of attention deficit hyperactivity disorder include ADD, ADHD, attention deficit disorder, MBD, minimal brain damage, minimal brain dysfunction.

attention deficit hyperactivity disorder (noun)	hyperkinetic syndrome (noun)
a condition (mostly in boys) characterized by behavioral and learning disorders	a condition (mostly in boys) characterized by behavioral and learning disorders