Established is a word that describes something that is well-known, widely recognized, and has been around for a long time. Synonyms for established include familiar, seasoned, entrenched, traditional, proven, and time-honored. These words convey a sense of stability and reliability, suggesting that something or someone has stood the test of time. They can also imply a sense of respectability and status, indicating that the person or thing has attained a certain level of success or authority. Other synonyms for established might include validated, confirmed, recognized, and acknowledged. These words emphasize the idea that something has been acknowledged as true or genuine, and cannot be disputed or challenged.