catheter vs tubing

catheter and tubing both are nouns.

Word	Noun	Adjective	Verb	Adverb
catheter	Yes	No	No	No
tubing	Yes	No	No	No

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

catheter: a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open
tubing: conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases

Other hypernyms of catheter include tube.

catheter (noun)	tubing (noun)
a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open	conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases