Fundamentalists are individuals who adhere to strict religious beliefs and practices. However, there are several synonyms for the word fundamentalists that can be used in appropriate contexts. Some of these synonyms include radicals, zealots, dogmatists, extremists, fanatics, and purists. Each of these words carries a slightly different connotation, but they all refer to individuals who are fervent in their beliefs and may hold extreme or uncompromising views. It is important to carefully consider the connotations of these synonyms before using them, as they may carry negative associations. Nonetheless, they can be useful in providing more varied and nuanced descriptions of individuals who hold strict beliefs, especially in political or social contexts.