dysphasia vs disability

dysphasia and disability both are nouns.

Word	Noun	Adjective	Verb	Adverb
dysphasia	Yes	No	No	No
disability	Yes	No	No	No

As nouns, disability is a hypernym of dysphasia; that is, disability is a word with a broader meaning than dysphasia:

dysphasia: an impairment of language (especially speech production) that is usually due to brain damage
disability: the condition of being unable to perform as a consequence of physical or mental unfitness

Other hypernyms of dysphasia include disablement, handicap, impairment.

dysphasia (noun)	disability (noun)
an impairment of language (especially speech production) that is usually due to brain damage	the condition of being unable to perform as a consequence of physical or mental unfitness