Alosa pseudoharengus vs clupeid

Alosa pseudoharengus and clupeid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alosa pseudoharengus	Yes	No	No	No
clupeid	Yes	No	No	No

As nouns, clupeid is a hypernym of Alosa pseudoharengus; that is, clupeid is a word with a broader meaning than Alosa pseudoharengus:

Alosa pseudoharengus: shad-like food fish that runs rivers to spawn; often salted or smoked; sometimes placed in genus Pomolobus
clupeid: any of numerous soft-finned schooling food fishes of shallow waters of northern seas

Other hypernyms of Alosa pseudoharengus include clupeid fish.

Alosa pseudoharengus (noun)	clupeid (noun)
shad-like food fish that runs rivers to spawn; often salted or smoked; sometimes placed in genus Pomolobus	any of numerous soft-finned schooling food fishes of shallow waters of northern seas