While there's no direct noun form ending in "-tion" for "advocate," here are some alternatives depending on the context:
* Advocacy: This is the most common noun form, referring to the act of supporting or pleading for a cause or person.
* Advocating: This can be used as a gerund (verb acting as a noun), referring to the process of advocating.
* Advocateship: This is a less common term but can be used to describe the role of an advocate.
* Advocacy: This is a more formal term, typically used in legal or political contexts.
The best option will depend on the specific situation and the desired level of formality.