clothes peg vs fixing

clothes peg and fixing both are nouns.

Word	Noun	Adjective	Verb	Adverb
clothes peg	Yes	No	No	No
fixing	Yes	No	No	No

As nouns, fixing is a hypernym of clothes peg; that is, fixing is a word with a broader meaning than clothes peg:

Other hypernyms of clothes peg include fastener, fastening, holdfast.

clothes peg (noun)	fixing (noun)
wood or plastic fastener; for holding clothes on a clothesline	the act of putting something in working order again
	the sterilization of an animal
	(histology) the preservation and hardening of a tissue sample to retain as nearly as possible the same relations they had in the living body
	restraint that attaches to something or holds something in place