Civil service examination is a crucial exam that determines the eligibility of candidates for various government posts. It's a highly competitive exam that tests the aptitude and knowledge of aspirants. If you're looking for synonyms for this term, you may consider using phrases like public service entrance exam, government service test, or state employment exam. Alternatively, you can use general terms such as competitive exam, recruitment exam, or entrance test. Other possible options include government eligibility test, civil service test, or public sector exam. Whatever phrase you use, these synonyms effectively describe the rigorous exam that applicants must pass to qualify for a government job.