"More Simon-pure" is an expression used to indicate pure, genuine, or authentic. When looking for synonyms of this phrase, one can consider "unadulterated," "unalloyed," or "unsullied." The term "uncontaminated" is also fitting when referring to something that is pure and free from any external impurities. "Authentic" or "genuine" can also be used to describe a person or thing that is true to its nature or origin, without any modifications or alterations. "Sincere," "honest," or "truthful" are also apt synonyms for the phrase "more simon-pure" as they denote someone or something that is straightforward and genuine in their intentions or actions.