Expanding and enlarging are good synonyms for the phrase "made big." Both words imply growth or an increase in size, whether it be physical or metaphorical. Another synonym is magnifying, which suggests a closer examination or scrutiny of something that was once small or insignificant. Other options include amplifying, augmenting, and elevating, all of which imply a positive change or enhancement. Conversely, some antonyms of "made big" might include reducing, shrinking, or diminishing, which connote a decrease in size or importance. The choice of synonyms will depend on the context and intended meaning of the phrase in question.