abuse vs insult

abuse and insult both are nouns.

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

As nouns, abuse and insult are synonyms defined as:

Other synonyms of abuse include contumely, revilement, vilification.

abuse (noun)	insult (noun)
improper or excessive use	a deliberately offensive act or something producing the effect of deliberate disrespect
cruel or inhumane treatment	a rude expression intended to offend or hurt
a rude expression intended to offend or hurt

abuse (verb)	insult (verb)
change the inherent purpose or function of something	treat, mention, or speak to rudely
use wrongly or improperly or excessively
use foul or abusive language towards
treat badly