The term "Fern Test" refers to a medical test used to diagnose certain conditions such as ruptured membranes in pregnant women. However, there are synonyms that could be used to refer to this test, such as "Amniofluid Test" or "Amniotic Fluid Test". Although both terms are different, they involve the same medical examination which is to check the fluids surrounding a fetus in the womb. Another synonym that can be used is "Nitrazine Test", which is used to determine the pH level of the amniotic fluid. Therefore, these terms could be used interchangeably depending on the context and preference of the medical practitioner.