impairment vs degradation

impairment and degradation both are nouns.

Word	Noun	Adjective	Verb	Adverb
impairment	Yes	No	No	No
degradation	Yes	No	No	No

As nouns, degradation is a hypernym of impairment; that is, degradation is a word with a broader meaning than impairment:

Other hypernyms of impairment include debasement.

impairment (noun)	degradation (noun)
damage that results in a reduction of strength or quality	changing to a lower state (a less respected state)
the act of making something futile and useless (as by routine)	a low or downcast state
the occurrence of a change for the worse
the condition of being unable to perform as a consequence of physical or mental unfitness
a symptom of reduced quality or strength