Is bottom a compound noun

Bottom is mostly a noun, but depending on the context it could also be a verb.

Examples:

* Noun - We are at the bottom of the hill.

* Verb - The submarine crew had to bottom the submarine to avoid enemy detection.

(To bottom a submarine means to rest motionless it on the ocean floor).

A verb is a Word that describes an action (run, walk, etc), a state of being (exist, stand, etc) or occurrence (happen, become, etc).

A noun is a Word that is used to describe a person (man, lady, teacher, etc), place (home, city, beach, etc) or thing (car, banana, book, etc).