As verbs the difference between insult and threat
is that
insult is (obsolete|intransitive) to behave in an obnoxious and superior manner (over, against) while
threat is (
label) to press; urge; compel.
As nouns the difference between insult and threat
is that
insult is an action or form of speech deliberately intended to be rude while
threat is an expression of intent to injure or punish another.