When it comes to courses that introduce students to a subject, there are a variety of ways to describe them beyond "introductory course." For example, one could call them "foundational courses," "basic courses," or "beginner courses." Other options include "entry-level courses," "preliminary courses," and "elementary courses." Some might even refer to them as "survey courses," "orientation courses," or "prerequisite courses." Ultimately, the exact terminology used may vary depending on the institution and context, but it's important to have a variety of synonyms at one's disposal to best convey what kind of course is being referred to.