seascape vs painting

seascape and painting both are nouns.

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

As nouns, painting is a hypernym of seascape; that is, painting is a word with a broader meaning than seascape:

seascape: a painting of the sea (as distinguished from a landscape)
painting: graphic art consisting of an artistic composition made by applying paints to a surface

Other hypernyms of seascape include picture.

seascape (noun)	painting (noun)
a painting of the sea (as distinguished from a landscape)	creating a picture with paints
a view of the sea	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