If you're looking for synonyms for the phrase "knock holes in", you'll be pleased to know that there are a variety of options available. Some of the most common synonyms for this phrase include "destroy", "crush", "shatter", "devastate", "demolish", "annihilate", "abolish", and "terminate". Depending on the context, some other possible synonyms might include "eradicate", "obliterate", "wipe out", "eliminate", "overturn", and "upend". Regardless of which synonym you choose, if you're trying to convey a sense of significant damage, destruction or disruption, there are plenty of powerful words that can help you get your point across.