"Rocket science" is a term often used to describe anything that is deemed difficult or complex in nature. However, there are several other synonyms for this term that can be used to convey the same meaning. For instance, the phrase "brain surgery" can be used to describe a task that requires a high degree of skill and precision. Similarly, the term "quantum mechanics" can be used to describe something that is incredibly intricate and difficult to understand. Other synonyms for "rocket science" include "astrophysics," "aerospace engineering," and "nuclear engineering." These words help communicate the level of complexity and expertise required to complete a task successfully.