painting vs cityscape

painting and cityscape both are nouns.

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

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

painting: graphic art consisting of an artistic composition made by applying paints to a surface
cityscape: painting depicting a city or urban area

painting (noun)	cityscape (noun)
creating a picture with paints	painting depicting a city or urban area
the occupation of a house painter	a viewpoint toward a city or other heavily populated area
the act of applying paint to a surface
graphic art consisting of an artistic composition made by applying paints to a surface