calcedony vs sardine

calcedony and sardine both are nouns.

Word	Noun	Adjective	Verb	Adverb
calcedony	Yes	No	No	No
sardine	Yes	No	No	No

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

Other hyponyms of calcedony include agate, bloodstone, heliotrope, carnelian, cornelian, chrysoprase, onyx, plasma, sard, sardius.

calcedony (noun)	sardine (noun)
a milky or greyish translucent to transparent quartz	any of various small edible herring or related food fishes frequently canned
	small fishes found in great schools along coasts of Europe; smaller and rounder than herring
	small fatty fish usually canned
	a deep orange-red variety of chalcedony