dyslexic vs impaired

dyslexic is a noun but impaired is not a noun.

Word	Noun	Adjective	Verb	Adverb
dyslexic	Yes	Yes	No	No
impaired	No	Yes	No	No

dyslexic (noun)	impaired (noun)
a person who has dyslexia

dyslexic (adjective)	impaired (adjective)
of or relating to or symptomatic of dyslexia	diminished in strength, quality, or utility
having impaired ability to comprehend written words usually associated with a neurologic disorder	mentally or physically unfit