Nonconcurrence means disagreement or lack of conformity. The opposite of nonconcurrence is concurrence, which implies agreement or conformity. For example, when two people have the same opinion or belief, they are in concurrence with each other. Another antonym for nonconcurrence is compliance, which means the act of obeying rules or laws. On the other hand, noncompliance is another antonym for nonconcurrence, which means the act of not following rules or laws. Therefore, to understand a word's meaning fully, it is essential to know its opposite or antonym, as it helps to clarify the term's definition.