art vs stipple

art is a noun but stipple is not a noun.

Word	Noun	Adjective	Verb	Adverb
art	Yes	No	No	No
stipple	No	No	Yes	No

art (noun)	stipple (noun)
the creation of beautiful or significant things
the products of human creativity; works of art collectively
a superior skill that you can learn by study and practice and observation
photographs or other visual representations in a printed publication

art (verb)	stipple (verb)
	produce a mottled effect
	engrave by means of dots and flicks
	make by small short touches that together produce an even or softly graded shadow, as in paint or ink
	apply (paint) in small dots or strokes