There are a variety of synonyms that can be used to describe something that is "giantlike". Some of these include colossal, immense, mammoth, towering, massive, gigantic, and humongous. Each of these words conveys a sense of size and strength that is often associated with giants. They can be used to describe physical objects, such as a building or a mountain, as well as figurative concepts, such as a powerful company or a larger-than-life personality. When choosing a synonym for "giantlike", it's important to consider the specific context in which it will be used in order to select the most appropriate and effective term.