What is the suffixes of capitalist?

There aren't really any suffixes for the word "capitalist" in the same way that "ing," "ed," or "er" are suffixes. However, the word itself is built with a suffix:

* -ist: This suffix is added to a noun to create a noun indicating someone who believes in or practices something.

For example:

* Capital (noun) + -ist = Capitalist (noun)

* Socialist (noun) - Socialist (noun)

* Environmental (adjective) + -ist = Environmentalist (noun)

So, while there aren't suffixes added *to* "capitalist," the word itself is formed using the suffix "-ist".