invective vs insult

invective and insult both are nouns.

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

As nouns, insult is a hypernym of invective; that is, insult is a word with a broader meaning than invective:

invective: abusive or venomous language used to express blame or censure or bitter deep-seated ill will
insult: a rude expression intended to offend or hurt

Other hypernyms of invective include abuse, contumely, revilement, vilification.

invective (noun)	insult (noun)
abusive or venomous language used to express blame or censure or bitter deep-seated ill will	a deliberately offensive act or something producing the effect of deliberate disrespect
	a rude expression intended to offend or hurt

invective (verb)	insult (verb)
	treat, mention, or speak to rudely