Double blind study is a popular methodology used in scientific research to reduce bias and increase the validity of the findings. However, there are various synonyms for double blind which could be useful for researchers who are looking to spice up their writing. Some possible alternatives include "masked study," "non-deceptive study," "placebo-controlled study," or "randomized controlled trial." Each of these terms carries a slightly different connotation and emphasis, so it's important to choose the right synonym based on the specific goals of your research. Regardless of which term you use, double blind procedures are a powerful tool for scientific inquiry and can help to ensure that your conclusions are based on solid evidence rather than unsupported assumptions.