Obstinateness is a term that is generally associated with stubbornness, inflexibility, and resistance to change. Some of the antonyms for obstinateness could include words such as flexibility, adaptability, willingness, openness, and compliance. Flexibility implies that an individual is open to change and can adopt new ideas easily. Adaptability is the ability to adjust to new environments and situations effectively. Willingness is the state of being ready to comply and cooperate without resistance. Openness is being receptive to new ideas and opinions. Lastly, compliance means the act of following rules without opposition, which is an opposite characteristic of obstinacy. In summary, antonyms for obstinateness are typically words that denote a willingness and openness to change and flexibility.