The phrase "knocked silly" is commonly used to describe a situation where someone is hit or struck with such force that they become dazed or confused. Some synonyms for this phrase include "stunned," "dazed," "perplexed," "bewildered," and "disoriented." These words all convey a similar sense of disorientation or confusion but may vary in degree depending on the severity of the blow or impact. Other synonyms might include "drunk with pain," "punch-drunk," "out of it," or "spacey." Regardless of the specific wording used, the end result is the same - a sense of overwhelming confusion or bewilderment.