There are several synonyms for the word "hole-ups," which refers to situations where someone is hiding or taking refuge in a particular place. One common synonym is "hideout," which refers to a place where someone can go to avoid being found or caught. Another synonym is "safe haven," which refers to a place where someone can feel secure and protected. "Shelter" is also a synonym for "hole-up," as it refers to a place that provides a place to stay or refuge from the elements. "Retreat" is another synonym that suggests a place of solitude and safety. Overall, these synonyms all suggest a place of safety, protection, and refuge.