harm vs wounding

harm and wounding both are nouns.

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

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

harm (noun)	wounding (noun)
the act of damaging something or someone	the act of inflicting a wound
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 (adjective)	wounding (adjective)
	causing physical or especially psychological injury

harm (verb)	wounding (verb)
cause or do harm to