hyperacusis vs hearing disorder

hyperacusis and hearing disorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
hyperacusis	Yes	No	No	No
hearing disorder	Yes	No	No	No

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

hyperacusis: abnormal acuteness of hearing due to increased irritability of the sensory neural mechanism; characterized by intolerance for ordinary sound levels
hearing disorder: impairment of the sense of hearing

Other hypernyms of hyperacusis include hearing impairment.

hyperacusis (noun)	hearing disorder (noun)
abnormal acuteness of hearing due to increased irritability of the sensory neural mechanism; characterized by intolerance for ordinary sound levels	impairment of the sense of hearing