dogfish vs grindle

dogfish and grindle both are nouns.

Word	Noun	Adjective	Verb	Adverb
dogfish	Yes	No	No	No
grindle	Yes	No	No	No

As nouns, dogfish and grindle are synonyms defined as:

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

Other synonyms of dogfish include Amia calva, bowfin.

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