"On the same wavelength" is a term used to describe individuals who share similar thoughts, attitudes and opinions. Some synonyms for this term include "in sync," "in harmony," "aligned," "connected," "in-tune," "attuned," "simultaneous," "coinciding," and "agreement." These expressions are often used to describe two or more people or groups who have a good understanding of each other's ideas and feelings. It's important to communicate effectively with those around you to ensure that everyone is on the same page and working towards the same goal. Using these synonyms can help convey your message and maintain productive relationships.