When something is "well worn," it means it has been used for a long time and has become noticeably worn out. Some synonyms for this phrase include "worn out," "well-used," "threadbare," "shabby," "faded," "dilapidated," "beat up," "tattered," "ratty," and "antiquated." "Worn in" is another phrase used to describe something that has been well used and is now comfortable. Similarly, "vintage," "classic," and "timeless" can also describe items that have been well used but are still appreciated for their age and style. Generally, using these synonyms can add depth and nuance to any written or spoken conversation related to well-worn items.