binding vs valid

binding is a noun but valid is not a noun.

Word	Noun	Adjective	Verb	Adverb
binding	Yes	Yes	No	No
valid	No	Yes	No	No

binding (noun)	valid (noun)
the act of applying a bandage
the protective covering on the front, back, and spine of a book
strip sewn over or along an edge for reinforcement or decoration
one of a pair of mechanical devices that are attached to a ski and that will grip a ski boot; the bindings should release in case of a fall
the capacity to attract and hold something

binding (adjective)	valid (adjective)
executed with proper legal authority	well grounded in logic or truth or having legal force
	still legally acceptable