The phrase "more perforce" can be interpreted as having a sense of necessity or inevitability. Some synonyms for this term may include "compulsory," "obligatory," or "mendatory." Other options to convey this same sense of obligation include "unavoidable," "inescapable," or "inescusable." Additionally, "imperative," "crucial," or "urgent" can also express the same idea of necessity. Depending on the context and tone of the sentence, another word that could be used is "indispensable," which implies that something is absolutely necessary for a specific purpose. Ultimately, the synonym used will depend on the intended meaning and overall tone of the text.