The phrase "is defeated" can be replaced with a variety of synonyms depending on the context and tone of the sentence. Some alternatives include "is vanquished," "is crushed," "is overcome," "is bested," "is subjugated," "is overpowered," and "is conquered." Each of these synonyms conveys a different level of intensity and finality to the defeat. "Is vanquished" and "is crushed" imply a complete and utter defeat, while "is overcome" suggests a more temporary setback. "Is conquered" and "is subjugated" have a more gloomy connotation and imply that the defeated party has lost both physically and emotionally. Ultimately, the choice of synonym should reflect the specific nuances and tones of the sentence.