The phrase "old guard" typically refers to long-time members of a group or organization who resist change and cling to traditional ways of doing things. There are several synonyms for this term, including "establishment," "traditionalists," "diehards," "conservatives," and "status quo supporters." These individuals often have a strong attachment to their group's history and culture and may view any attempts to modernize or innovate as a threat to their values and identity. However, it is important to note that not all long-time members fall into this category; some are open-minded and progressive, while others may simply be comfortable with the status quo.