The phrase "more and more" can be replaced by a variety of synonyms to add variety and interest to your writing. Some possible synonyms include "increasingly," "ever greater," "mounting," "escalating," "augmenting," "expanding," "growing," "heightening," "amplifying," "intensifying," "multiplying," "building," and "proliferating." Each of these words conveys a sense of gradual growth or accumulation, making them suitable for use in a wide range of contexts, from academic writing to creative fiction. Using synonyms can help to keep your writing fresh and engaging, while also helping to avoid repetition and monotony.