A boxholder refers to someone who holds a box or container. However, there are several synonyms that can be used instead of the word boxholder to make the writing more vivid and colorful. Some of these synonyms include crate keeper, container caretaker, receptacle holder, container manager, container stocker, and box supervisor. These words perfectly capture the essence of someone who is responsible for looking after boxes and containers. Choosing appropriate synonyms can help writers expand their vocabulary, and make their writing more interesting and engaging to read.