When it comes to finding synonyms for "strong as a horse," one can consider several options. Some alternatives might include "mighty," "powerful," "heavy-duty," or "sturdy." Each of these terms conveys an image of impressive physical strength and resilience, akin to that of a strong horse. Additionally, some other possibilities might include "unbreakable," "indestructible," "invincible," or "unstoppable," implying a level of toughness that is difficult to overcome or defeat. Regardless of the word chosen, the meaning remains the same: a force to be reckoned with, capable of enduring and withstanding tremendous amounts of pressure, just like a robust and healthy horse.