sardine vs pilchard

sardine and pilchard both are nouns.

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

As nouns, sardine and pilchard are synonyms defined as:

sardine and pilchard: small fishes found in great schools along coasts of Europe; smaller and rounder than herring

Other synonyms of sardine include Sardina pilchardus.

As nouns, sardine and pilchard are synonyms defined as:

sardine (noun)	pilchard (noun)
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 fishes found in great schools along coasts of Europe; smaller and rounder than herring	small fatty fish usually canned
small fatty fish usually canned
a deep orange-red variety of chalcedony