Which word describes intense emotion or passion, perhaps relating to heated discussions?

The term "fervor" accurately captures the essence of intense emotion or passion, particularly in contexts such as heated discussions or debates. Fervor encompasses a strong, enthusiastic expression of feelings or beliefs, driving individuals to engage deeply and passionately in conversations or arguments. This word evokes an image of fervent advocates who are deeply invested in their views, often leading to vigorous exchanges.

In contrast, the other terms carry different meanings that do not align with the idea of intense emotion. "Fickle" refers to someone who is changeable or inconsistent, especially regarding their feelings or opinions. "Forsake" means to abandon someone or something, which relates more to a decision of leaving rather than expressing passion. "Filibuster" pertains to a political strategy aimed at delaying or obstructing legislative action, which involves tactics rather than emotional intensity. Thus, "fervor" is distinctly suited to describe passionate and intense emotional engagement.