There are various synonyms for the phrase "bleed into" that can be used to enrich your vocabulary. Some alternatives include "seep into," "merge with," "blend into," "soak into," "penetrate," and "permeate." These synonyms therefore connote the idea of something gradually diffusing or becoming a part of something else. While "bleed into" suggests a slow and gradual diffusion of something into another thing, its synonyms may signify a more abrupt or thorough fusion. It is important to use synonyms effectively by considering the context in which they are being used as well as their connotations, to ensure a better understanding of the message being conveyed.