Retrorse is a term used to describe something that has a backward, or reversed, orientation. However, there are many antonyms for the word retrorse which describe things that have a forward orientation, such as straight or erect. Some other antonyms for retrorse could include words like advance, advance, move forward, march, walk forward, or forward-looking. Depending on the context or industry, the opposing term for retrorse can vary greatly. For example, in architecture, antonyms like front-facing, straight, or inclined could be used, whereas in biology, words like protrude, extend, or outcast could be seen as antonyms.