impairment vs ravel

impairment and ravel both are nouns.

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

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

Other hyponyms of impairment include detriment, hurt, deformation, distortion, ladder, run.

impairment (noun)	ravel (noun)
damage that results in a reduction of strength or quality	a row of unravelled stitches
the act of making something futile and useless (as by routine)
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

impairment (verb)	ravel (verb)
	tangle or complicate
	disentangle