impairment vs corrosion

impairment and corrosion both are nouns.

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

As nouns, corrosion is a hyponym of impairment; that is, corrosion is a word with a more specific, narrower meaning than impairment:

impairment: a symptom of reduced quality or strength
corrosion: a state of deterioration in metals caused by oxidation or chemical action

Other hyponyms of impairment include desolation, devastation, decrepitude, dilapidation, wear.

impairment (noun)	corrosion (noun)
damage that results in a reduction of strength or quality	erosion by chemical action
the act of making something futile and useless (as by routine)	a state of deterioration in metals caused by oxidation or chemical action
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