There are several synonyms for the term "most propounded". One of the best alternatives to this term is "most advocated". It means promoting or supporting an idea or belief by speaking or writing in favor of it. Other synonyms for "most propounded" include "most promoted", "most advanced" and "most suggested". These words signify a certain level of popularity or acceptance that a proposition or idea holds in a given context. "Most popularized", "most commonly espoused" and "most widely suggested" are also useful synonyms that can be employed when referring to ideas or proposals that have gained widespread acceptance or currency.