An echo chamber is a term used to describe a situation where individuals or groups communicate only with those who share their views, reinforcing their existing beliefs and not being exposed to alternative perspectives. Synonyms for echo chamber include bubble, filter bubble, closed loop, isolated silo, and information cocoon. These terms highlight the insular and exclusive nature of echo chambers and emphasize the dangers of groupthink and the potential for misinformation to thrive. It is essential for individuals to challenge their beliefs and seek out diverse perspectives to broaden their understanding of complex issues and avoid falling into the trap of being stuck in an echo chamber.