"More plumbous" is a phrase used to describe something that is heavier or denser than the normal weight or density. Some synonyms for "more plumbous" include "more weighty," "more massive," "more substantial," "more bulky," and "more ponderous." These words can be used interchangeably depending on the context and intention. For example, if you wanted to describe a thick and heavy book, you could say it is "more weighty" or "more massive" than a usual paperback novel. Likewise, if you wanted to describe a large and heavy piece of furniture, you could use the word "more ponderous" or "more bulky".