What part of speech is credentials?

"Credentials" can be a few parts of speech depending on how it's used:

* Noun (plural): This is the most common usage. "Credentials" refers to documents or certificates that prove a person's qualifications or authority.

* Adjective: Less common, "credentialed" is used to describe something that requires or proves qualifications, like "credentialed staff".

Here are some examples:

Noun:

* "She presented her credentials to the security guard."

* "The job requires strong credentials in marketing."

Adjective:

* "The company only hires credentialed professionals."

Let me know if you have any other questions!