acataphasia vs brain disorder

acataphasia and brain disorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
acataphasia	Yes	No	No	No
brain disorder	Yes	No	No	No

As nouns, brain disorder is a hypernym of acataphasia; that is, brain disorder is a word with a broader meaning than acataphasia:

acataphasia: a disorder in which a lesion to the central nervous system leaves you unable to formulate a statement or to express yourself in an organized manner
brain disorder: any disorder or disease of the brain

Other hypernyms of acataphasia include brain disease, encephalopathy.

acataphasia (noun)	brain disorder (noun)
a disorder in which a lesion to the central nervous system leaves you unable to formulate a statement or to express yourself in an organized manner	any disorder or disease of the brain