"Am on same wavelength" implies that two or more people are in agreement and understand each other well. The antonyms for this phrase could be "out of sync," "disconnected," or "unrelated." When individuals are out of sync with each other, it means that they are not on the same page and do not share a common understanding. Disconnected individuals lack a sense of connection or compatibility, while unrelated individuals have nothing in common and cannot form a cohesive bond. Hence, it is essential to be aware of the antonyms for "am on same wavelength" to better communicate and maintain positive relationships with others.