There are several synonyms to describe someone who is passionate. For instance, enthusiastic people are characterized by their high level of zeal and devotion to a particular cause or subject. Similarly, fervent individuals show intense and sincere feelings about something they feel strongly about. An ardent person exhibits an intense passion and devotion to a particular thing or idea. Being driven suggests someone who is highly motivated and committed to achieving their goals and ambitions. Finally, an impassioned person shows strong feelings and emotions, typically displayed through their speech or actions. All these words are great alternatives to "are passionate" and can help you better describe individuals who possess an unwavering zeal and deep commitment to their interests.