Roundheads were a term used to describe the supporters of Parliamentarians during the English Civil War. The term has since moved beyond this specific group to refer to people with similar ideas or appearance. Synonyms for the word include Puritans, Reformers, Parliamentarians, Radicals, Independents, and Revolutionaries. Other phrases that could be used to describe Roundheads include "the party of Reformers," "friends of liberty," or "progressive thinkers." While these terms may have different connotations, each reflects the values of those who advocated for change and a more equal society during a time of political and cultural upheaval.