The bear was grumbling a menacing rumble. is the word in this sentence noun?

The word "rumble" in the sentence "The bear was grumbling a menacing rumble" is a noun.

Here's why:

* Noun: A noun is a word that names a person, place, thing, or idea.

* In this sentence, "rumble" refers to the sound the bear is making, making it a thing.

Let me know if you have any more questions about parts of speech!