The term "sudsable" refers to the ability of a substance to create suds or froth when mixed with water. If you are looking for synonyms for this word, you may want to consider using terms such as "foamy", "lathery", "bubbly", or "frothy". These words are often used to describe substances that can generate a thick, sudsy lather when combined with water, such as soap, shampoo, or even beer. Other related terms that you might consider include "fizzing", "effervescent", and "sparkling", which can be used to describe substances that produce bubbles or effervescence when mixed with liquid.