harm vs ravel

harm and ravel both are nouns.

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

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

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

harm (noun)	ravel (noun)
the act of damaging something or someone	a row of unravelled stitches
the occurrence of a change for the worse
any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury

harm (verb)	ravel (verb)
cause or do harm to	tangle or complicate
	disentangle