Interesting point. I'm trying to think of some examples in Chinese. Unlike English, Chinese has no inflection (so things like dove/dove and wound/wound do not exist). Also, each word in Chinese is made up of meaningful unit, so a new word can be made by simply adding a morpheme. That said, there are examples of the likes of "produce produce", where an verb is also a noun.

When you said same words with different meanings in poetry, did you mean in a metaphorical sense?