inner tube vs tubing

inner tube and tubing both are nouns.

Word	Noun	Adjective	Verb	Adverb
inner tube	Yes	No	No	No
tubing	Yes	No	No	No

As nouns, tubing is a hypernym of inner tube; that is, tubing is a word with a broader meaning than inner tube:

inner tube: an inflatable rubber tube that fits inside the casing of a pneumatic tire
tubing: conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases

Other hypernyms of inner tube include tube.

inner tube (noun)	tubing (noun)
an inflatable rubber tube that fits inside the casing of a pneumatic tire	conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases