It depends...
If you mean to paint as in "Paint a picture", paint is a verb because it shows action. But if you mean paint as in the literal painting material, then paint is used as a noun because it's a "thing".
The word painting can be a noun as in a piece of art.
It can also be a verb where it is the present participle of paint.
It is a noun as in canvass you paint on. It is a verb as in to canvass someone for a vote.
The word painted is a verb. It is the past tense of paint.
adverb
what part of speech is work
i want to know what part of speech is camping
A noun - as in a tin of paint. A verb - as in to cover the surface of something with paint.
It is a noun as in canvass you paint on. It is a verb as in to canvass someone for a vote.
The word painted is a verb. It is the past tense of paint.
The word painting can be a noun as in a piece of art. It can also be a verb where it is the present participle of paint.
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is work
what part of speech is beneath
Depending on how it's used, olive can be a noun or an adjective.Noun: Green olives are my favorite.Adjective: Olive green is an interesting color to paint a room.
the part of speech sashay is a averb
Did is a verb, and not is an adverb. Didn't is not any part of speech. It's a contraction of did and not.