moss-trooper vs piranha

moss-trooper and piranha both are nouns.

Word	Noun	Adjective	Verb	Adverb
moss-trooper	Yes	No	No	No
piranha	Yes	No	No	No

As nouns, piranha is a hypernym of moss-trooper; that is, piranha is a word with a broader meaning than moss-trooper:

moss-trooper: a marauder and plunderer (originally operating in the bogs between England and Scotland)
piranha: someone who attacks in search of booty

Other hypernyms of moss-trooper include marauder, predator, vulture.

moss-trooper (noun)	piranha (noun)
a marauder and plunderer (originally operating in the bogs between England and Scotland)	small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals
	someone who attacks in search of booty