The term "are stubborn" can be replaced by several synonyms such as obstinate, tenacious, adamant, persistent, and inflexible. Each of these synonyms describes a person who demonstrates a firm and unyielding attitude towards a particular belief, opinion, or action. Those who are obstinate refuse to change their mind, while the tenacious persist in pursuing their goals. Similarly, the adamant are resolute and unwavering in their stance, while the inflexible reject compromise or adaptation. Ultimately, all these synonyms represent a determined individual who refuses to be swayed from their position, demonstrating a strength of character that can be both admirable and challenging.