The word "be defeated" refers to losing or failing in a particular contest or struggle. However, there are many synonyms that can be used to convey the same meaning. Some of the common synonyms for "be defeated" include "lose," "fail," "surrender," "yield," "concede," "fall short," and "be vanquished." Each of these words can be used depending on the context in which they are used. For instance, "lose" is used when one's team is unable to win a game, while "fail" can be used when one is unable to achieve a particular goal. It is essential to use the right synonym to convey the exact meaning to the reader or listener.