sardine vs sild

sardine and sild both are nouns.

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

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

sardine: any of various small edible herring or related food fishes frequently canned
sild: any of various young herrings (other than brislings) canned as sardines in Norway

Other hyponyms of sardine include brisling, Clupea sprattus, sprat.

sardine (noun)	sild (noun)
any of various small edible herring or related food fishes frequently canned	any of various young herrings (other than brislings) canned as sardines in Norway
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