garnet vs carbuncle

garnet and carbuncle both are nouns.

Word	Noun	Adjective	Verb	Adverb
garnet	Yes	No	No	No
carbuncle	Yes	No	No	No

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

garnet: any of a group of hard glassy minerals (silicates of various metals) used as gemstones and as an abrasive
carbuncle: deep-red cabochon garnet cut without facets

Other hyponyms of garnet include almandine, almandite, andradite, cinnamon stone, essonite, hessonite, pyrope, rhodolite.

garnet (noun)	carbuncle (noun)
any of a group of hard glassy minerals (silicates of various metals) used as gemstones and as an abrasive	an infection larger than a boil and with several openings for discharge of pus
	deep-red cabochon garnet cut without facets