written vs backhand

written is not a noun while backhand is a noun.

Word	Noun	Adjective	Verb	Adverb
written	No	Yes	No	No
backhand	Yes	Yes	Yes	No

written (noun)	backhand (noun)
	a return made with the back of the hand facing the direction of the stroke

written (adjective)	backhand (adjective)
set down in writing in any of various ways	(of racket strokes) made across the body with back of hand facing direction of stroke
systematically collected and written down	(of handwriting) having the letters slanting backward
written as for a film or play or broadcast

written (verb)	backhand (verb)
	hit a tennis ball backhand