The phrase "am coming" can be replaced with a variety of synonyms depending on the context and level of formality. Some alternatives include "arriving," "approaching," "coming near," "drawing close," "getting closer," and "moving forward." Depending on the situation, more colloquial options may include "on my way," "en route," "almost there," "just about here," or "on the horizon." Of course, the specific synonym chosen will depend on the tone and context of the conversation. Regardless of the specific word choice, each of these synonyms serves to convey the idea of someone or something moving closer or arriving at a particular location.