monkfish vs allmouth

monkfish and allmouth both are nouns.

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

As nouns, monkfish and allmouth are synonyms defined as:

monkfish and allmouth: fishes having large mouths with a wormlike filament attached for luring prey

Other synonyms of monkfish include angler, angler fish, anglerfish, goosefish, Lophius Americanus, lotte.

monkfish (noun)	allmouth (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
flesh of a large-headed anglerfish of the Atlantic waters of North America