Substantializing is the act of making something more significant or substantial. There are many synonyms for this word, including strengthening, reinforcing, solidifying, enhancing, and fortifying. These words all convey the idea of giving something greater substance, whether it be a physical object or an abstract concept. Other synonyms for substantializing include consolidating, intensifying, amplifying, augmenting, and bolstering. All of these words essentially mean to make something stronger, more concrete, or more impactful. Whether you are trying to describe a process of building something up or a mental process of making something more substantial in your mind, these synonyms can help you to convey your meaning more effectively.