From the given options, choose the one that would mean the SAME as harmony.

A synonym is a word that shares the same core meaning or connotation as another word in a given context, rather than merely appearing in similar sentences. To find a synonym, first identify the essential sense the given word conveys, then match that same sense against each option, ruling out words that carry an opposite or unrelated connotation even if they are loosely related in topic.

Harmony conveys a state of agreement, peace, and accord among people, ideas, or parts working together. Among the given options, only unity carries this same sense of people or parts existing together in agreement, making it the closest match to harmony.

Checking each remaining option against this core sense of agreement confirms none of them share it:

• discord names a state of disagreement or conflict, the opposite sense to agreement, so it does not match.

• friction names tension or conflict between people or forces, again the opposite sense, so it does not match.

• difference names a point of distinction or disparity between things, not a state of agreement, so it does not match.