When we say a place or surface "is crawling with" something, it means that it's filled or swarming with a large number of that thing. Some synonyms for this phrase include "infested with," "teeming with," "overrun with," "crowded with," "overflowing with," and "swarming with." Each of these phrases conveys a sense of abundance or excess, emphasizing the overwhelming nature of the presence of the thing being referred to. They can be used to describe all sorts of scenarios, from a house infested with ants to a city overrun with tourists. Whatever the context, these synonyms help us paint a vivid picture of just how dense the situation is.