injure vs insult

injure is not a noun while insult is a noun.

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

As verbs, insult is a hyponym of injure; that is, insult is a word with a more specific, narrower meaning than injure:

Other hyponyms of injure include affront, diss, lacerate, sting, abase, chagrin, humble, humiliate, mortify.

injure (noun)	insult (noun)
	a deliberately offensive act or something producing the effect of deliberate disrespect
	a rude expression intended to offend or hurt

injure (verb)	insult (verb)
cause injuries or bodily harm to	treat, mention, or speak to rudely
cause damage or affect negatively
hurt the feelings of