insult vs invective

insult and invective both are nouns.

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

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

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

Other hyponyms of insult include low blow, billingsgate, scurrility, cut, stinger, vitriol, vituperation.

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

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