"Rope down" is an expression often used to describe descending or lowering something using a rope. There are several synonyms for this phrase that you can use to add variety to your writing. These synonyms include words like "lower," "descend," "drop," "let out," or "bring down." Additionally, you can use more specific terms like "abseil," "repel," "rappel," or "belay." These words are often used in mountaineering or rock-climbing contexts. Remember, using synonyms is an effective way to make your writing more diverse and dynamic while communicating the same meaning.