There are several synonyms for the phrase "more quintan," which means to be even more fifth or fivefold. These synonyms include amplified, intensified, augmented, heightened, and escalated. These terms all describe the act of increasing or boosting something beyond its current level. They can be applied to various contexts, such as in mathematics, music, language, and everyday life. Using these synonyms in place of "more quintan" can add variety and depth to one's vocabulary and avoid repetition in writing or speech. Ultimately, these synonyms serve as useful tools to convey the idea of something being elevated or increased to a greater degree.