Amia calva vs dogfish

Amia calva and dogfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
Amia calva	Yes	No	No	No
dogfish	Yes	No	No	No

As nouns, Amia calva and dogfish are synonyms defined as:

Amia calva and dogfish: primitive long-bodied carnivorous freshwater fish with a very long dorsal fin; found in sluggish waters of North America

Other synonyms of Amia calva include bowfin, grindle.

Amia calva (noun)	dogfish (noun)
primitive long-bodied carnivorous freshwater fish with a very long dorsal fin; found in sluggish waters of North America	any of several small sharks
	primitive long-bodied carnivorous freshwater fish with a very long dorsal fin; found in sluggish waters of North America