harm vs injure

harm is a noun but injure is not a noun.

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

As verbs, injure is a hypernym of harm; that is, injure is a word with a broader meaning than harm:

Other hypernyms of harm include wound.

harm (noun)	injure (noun)
the act of damaging something or someone
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)	injure (verb)
cause or do harm to	cause injuries or bodily harm to
	cause damage or affect negatively
	hurt the feelings of