What part of speech is invention?

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

* Noun: This is the most common usage. It refers to the act of creating something new, or the thing created itself.

* Example: "The telephone was a revolutionary invention."

* Verb: This usage means "to create something new."

* Example: "The company is constantly inventing new products."

Let me know if you'd like more examples!