patching vs fixture

patching and fixture both are nouns.

Word	Noun	Adjective	Verb	Adverb
patching	Yes	No	No	No
fixture	Yes	No	No	No

As nouns, fixture is a hypernym of patching; that is, fixture is a word with a broader meaning than patching:

Other hypernyms of patching include fix, fixing, mend, mending, repair, reparation.

patching (noun)	fixture (noun)
the act of mending a hole in a garment by sewing a patch over it	the act of putting something in working order again
	an object firmly fixed in place (especially in a household)
	the quality of being fixed in place as by some firm attachment
	a regular patron