painting vs speedpaint

painting and speedpaint both are nouns.

Word	Noun	Adjective	Verb	Adverb
painting	Yes	No	No	No
speedpaint	Yes	No	No	No

As nouns, speedpaint is a hyponym of painting; that is, speedpaint is a word with a more specific, narrower meaning than painting:

painting (noun)	speedpaint (noun)
creating a picture with paints	Painting a picture in a very short amount of time
the occupation of a house painter
the act of applying paint to a surface
graphic art consisting of an artistic composition made by applying paints to a surface