Menstruum is a scientific term used to describe a solvent or a menstruation discharge. Here are some synonyms that can be used instead of menstruum for a solvent: solvent medium, dissolvent, diluent, carrier liquid, thinner, diluting agent. Other synonyms that can be used for menstruation discharge are: menstrual blood, menstrual fluid, period, menstruation cycle, monthly flow, menses, menstrual discharge, and menstrual period. It is essential to use appropriate words according to the context, and these synonyms can help to make the content more suitable for the audience. Additionally, using proper synonyms can make the text clearer, engaging, and easier to comprehend.