Obstinacy is a personality trait often associated with stubbornness and inflexibility. Synonyms for the word obstinacy include uncompromising, resolute, firmness, steadfastness, and rigidity. Other words that can be used interchangeably with obstinacy are pigheadedness, bullheadedness, doggedness, and determination. These words imply that an individual is unwilling to change their stance or beliefs even when faced with persuasive arguments or evidence against them. While obstinacy can be seen as a negative trait, it can also be seen as a positive trait in individuals who display strong convictions and unwavering principles. Knowing and using these synonyms can help express the idea of obstinacy more creatively and effectively.