The phrase "are based" often indicates a connection between two or more things. Some synonyms for this phrase include "stem from," "derive from," "originate from," "grounded in," "rooted in," and "rest on." Each of these phrases suggests a source or foundation for something else, whether it be an idea, an argument, or a situation. "Stem from" implies that something grew or developed from a previous source, while "derive from" suggests an origin or starting point. "Originate from" indicates the first point of existence, while "grounded in," "rooted in," and "rest on" all suggest a solid foundation or basis for something.