The term "most shipping" can be replaced by a variety of synonyms, depending on the context and the emphasis of the sentence. Some alternatives include "largest volume of shipments," "highest amount of shipping," "majority of shipments," "leading shipping activity," and "predominant shipping trend." Other possible synonyms could be "top shipping rate," "dominant shipping pattern," or "primary shipping mode." These various synonyms can help to make your writing more precise and impactful, enabling you to convey your ideas with greater clarity and precision. Ultimately, the choice of synonym will depend on the specific context of your writing and the intended effect you wish to achieve.