fixture vs darning

fixture and darning both are nouns.

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

As nouns, darning is a hyponym of fixture; that is, darning is a word with a more specific, narrower meaning than fixture:

fixture (noun)	darning (noun)
the act of putting something in working order again	the act of mending a hole in a garment with crossing threads
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