Alkalescent is a word that describes something that has a pH level above 7, making it alkaline. However, if you're looking for synonyms to describe something that is "more alkalescent," there are a few options. Basic, alkaline, and high-pH are all excellent alternatives. You can use these words interchangeably to convey the same meaning as "more alkalescent." Additionally, some other words that can be used are alkaloid, alkalizing, base-forming, and neutralizing. Depending on the context, the specific synonym you use may change, but all of these words should convey the same idea of something that is alkaline or basic in nature.