The phrase "in the hold" typically refers to something that is stored or transported within the cargo area of a plane or ship. Some synonyms that can be used instead of "in the hold" could be "in the cargo hold," "in the storage compartment," "in the shipping container," or "below deck." These phrases all convey the same idea of something being secured and stored for transportation. It's important to ensure that cargo or items being transported are properly stored and secured to avoid any damage or safety concerns during transit. Using alternative phrases can add variety to your writing and help avoid repetition.