fixing vs band aid

fixing and band aid both are nouns.

Word	Noun	Adjective	Verb	Adverb
fixing	Yes	No	No	No
band aid	Yes	No	No	No

As nouns, band aid is a hyponym of fixing; that is, band aid is a word with a more specific, narrower meaning than fixing:

fixing (noun)	band aid (noun)
the act of putting something in working order again	hurried repair
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