* "Prosper" is already a complete word. It has a clear meaning on its own, so adding suffixes often feels unnecessary or awkward.
* Suffixes usually modify the meaning of a word. For example, adding "-ing" makes a verb into a gerund ("prospering").
However, you *can* create related words using prefixes:
* "Prosperous" (adjective) - This is the most common and natural way to create an adjective related to prosper.
* "Prosperity" (noun) - Refers to the state of being prosperous.
You could also use "prosper" as part of a compound word, but these are less common:
* "Prosper-well" (hypothetical - would refer to something that helps one prosper)
* "Prosper-minded" (hypothetical - someone who thinks in terms of success)
It's important to note that these compound words are not widely used and might sound a bit artificial.
In most cases, "prosperous" and "prosperity" are the most useful and natural ways to extend the word "prosper."