acid test Synonyms

test appraisal of worth crucial appraisal foolproof test infallible test party with acid drugs party with drugs rigorous appraisal stiff test test giving incontestable result test to establish genuineness appraisal of value appraisal of quality very thourough test trial litmus test test case critical appraisal conclusive test final test decisive test serious test rigorous test severe test test to establish quality