The phrase "one into" can have several synonyms depending on the context. If we are talking about a transformation or conversion, the synonyms could be "changed into," "converted to," or "transformed into." If we are discussing a process of becoming engrossed or absorbed in something, the synonyms could be "immersed in," "engaged in," or "captivated by." Alternatively, if we are referring to an investigation or exploration of something or someone, synonyms could include "delving into," "investigating," or "researching." Ultimately, the synonyms for "one into" vary depending on the intended meaning and can range from conversion to exploration.