The antonyms for "hindmost parts" are the front, head, foremost or leading parts of something. These antonyms represent the opposite end of the spectrum, indicating the front or the beginning of the object, whereas "hindmost parts" refer to the end or the tail-end of the object. For instance, the hindmost parts of a train are the last carriages, while the foremost parts are the engine and the first carriage. Similarly, in anatomy, the hindmost parts refer to the back of the body while the front parts refer to the chest, abdomen, or face. In summary, the antonyms of "hindmost parts" are opposite ends, either the head, front or leading parts of something.