sardine vs sard

sardine and sard both are nouns.

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

As nouns, sardine and sard are synonyms defined as:

Other synonyms of sardine include sardius.

sardine (noun)	sard (noun)
any of various small edible herring or related food fishes frequently canned	a deep orange-red variety of chalcedony
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