There are several synonyms for the term "base tests" that can be used to describe fundamental assessments or examinations. These can include "foundational tests," which refers to assessments that establish or confirm a student's basic knowledge and understanding of a subject. Another synonym could be "core tests," which are the assessments that are essential to a curriculum or academic program. "Fundamental tests" is another alternative that refers to assessments that cover fundamental concepts and skills in a subject. Lastly, "basic assessments" can be used to describe tests that measure a student's foundational understanding of a particular subject or skill.