"Stump" is a word that describes the remaining part of a tree or plant after it has been cut down. It can also refer to a difficult problem or obstacle that must be overcome. However, there are many synonyms that can be used in place of "stump". For example, "trunk" can refer to the main stem of a tree, while "remnant" can describe the remaining portion of something. "Stub" and "stubble" are other words that can be used to describe a shortened or cut-off part of a tree or object. "Hurdle" and "obstacle" are also synonyms that can describe a challenging task or obstacle to overcome. Choosing the right synonym can add depth and nuance to your writing.