Hardliners are individuals who hold firm beliefs and are uncompromising in their stance on a particular issue. Some synonyms for hardliners include absolutists, extremists, radicals, purists, zealots, dogmatists, fundamentalists, uncompromising, and inflexible. These individuals often take an extreme approach to their beliefs and can be resistant to change or compromise. They tend to be more rigid and less open-minded than their more moderate counterparts, and as such, can be more challenging to work with or negotiate with. Regardless of their specific beliefs or political affiliations, hardliners are known for their unwavering commitment and determination to their cause.