karabiner vs fixing

karabiner and fixing both are nouns.

Word	Noun	Adjective	Verb	Adverb
karabiner	Yes	No	No	No
fixing	Yes	No	No	No

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

karabiner: an oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes
fixing: restraint that attaches to something or holds something in place

Other hypernyms of karabiner include fastener, fastening, holdfast, hoop, ring, climbing equipment, rock-climbing equipment.

karabiner (noun)	fixing (noun)
an oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes	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