A "severe test" is a challenging or demanding evaluation of one's abilities, knowledge, or skills. Its antonyms, or opposite words, would be "easy test," "simple task," or "relaxed assessment." These kinds of tests or tasks wouldn't require much effort or struggle, making them less stressful and more manageable. Another antonym for a "severe test" could be a "passing grade," indicating that the evaluation was not so challenging that one couldn't achieve a satisfactory result. Conversely, synonyms for "severe test" might include "rigorous exam," "demanding challenge," or "arduous assessment.