binding vs sewing

binding and sewing both are nouns.

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

As nouns, sewing is a hypernym of binding; that is, sewing is a word with a broader meaning than binding:

Other hypernyms of binding include stitchery.

binding (noun)	sewing (noun)
the act of applying a bandage	joining or attaching by stitches
the protective covering on the front, back, and spine of a book	needlework on which you are working with needle and thread
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)	sewing (adjective)
executed with proper legal authority