Thimble eye is a term used in the field of rigging to refer to an eye-shaped hole in a pulley or block. In order to make communication easier, it is important to be familiar with synonyms for this term. Some common alternatives include thimble, eye splice, loop splice, and rope splice. Each of these synonyms is used to describe the same general shape and function of the hole in the pulley or block. Whether you are new to rigging or an experienced professional, it's crucial to be familiar with these synonyms in order to clearly communicate with your colleagues.