What part of speech is research?

"Research" can be several parts of speech, depending on how it's used in a sentence:

* Noun: When referring to the activity of systematic investigation, it's a noun.

* Verb: When describing the act of doing research, it's a verb.

Here are some examples:

Noun: "The scientist conducted research on the effects of climate change."

Verb: "The student is researching the history of the American Revolution."

Let me know if you have any other words you'd like to explore!