insult vs discourtesy

insult and discourtesy both are nouns.

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

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

insult: a deliberately offensive act or something producing the effect of deliberate disrespect
discourtesy: a lack of politeness; a failure to show regard for others; wounding the feelings of others

Other hypernyms of insult include offence, offense, offensive activity.

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

Other hypernyms of insult include disrespect.

insult (noun)	discourtesy (noun)
a deliberately offensive act or something producing the effect of deliberate disrespect	a lack of politeness; a failure to show regard for others; wounding the feelings of others
a rude expression intended to offend or hurt	a manner that is rude and insulting
	an expression of lack of respect

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