clupeid vs clupeid fish

clupeid and clupeid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
clupeid	Yes	No	No	No
clupeid fish	Yes	No	No	No

As nouns, clupeid and clupeid fish are synonyms defined as:

clupeid and clupeid fish: any of numerous soft-finned schooling food fishes of shallow waters of northern seas

clupeid (noun)	clupeid fish (noun)
any of numerous soft-finned schooling food fishes of shallow waters of northern seas	any of numerous soft-finned schooling food fishes of shallow waters of northern seas