Some synonyms for the word "ebb" can include "recede," "withdraw," "subside," or "diminish." "Recede" implies a gradual movement away from a point or position, while "withdraw" refers to a deliberate removal or departure. "Subside" suggests a decrease in intensity or force, and "diminish" implies a reduction in size or strength. Other synonyms for "ebb" could include "waning," "decline," "ebb and flow," or "recession." The word "ebb" itself has a variety of meanings, ranging from the receding of the tide to a decline in strength or prosperity, so its synonyms can also have a range of connotations and applications.