What does it mean to change one word to another word that has the same meaning?

Synonym

Explanation:

A synonym is a word that is very similar to another.

An antonym is a word that is the opposite to another.

a word that has the same meaning as another word is a synonym

Explanation:

for example a synonym of strong would be powerful since they nearly have the same meaning

the personification of the word prudence d) it effectively enhances the logos and ethos of the argument.

logos means appeal to the logic or reasoning of the people.

ethos means appeal to the credibility of the argument, that it is worth listening to and acting upon.

what is the context here? we need to know what story you're talking about : )