monkfish vs monkfish

monkfish and monkfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
monkfish	Yes	No	No	No
monkfish	Yes	No	No	No

monkfish (noun)	monkfish (noun)
fishes having large mouths with a wormlike filament attached for luring prey	fishes having large mouths with a wormlike filament attached for luring prey
sharks with broad flat bodies and winglike pectoral fins but that swim the way sharks do	sharks with broad flat bodies and winglike pectoral fins but that swim the way sharks do
flesh of a large-headed anglerfish of the Atlantic waters of North America	flesh of a large-headed anglerfish of the Atlantic waters of North America