vulture vs piranha

vulture and piranha both are nouns.

Word	Noun	Adjective	Verb	Adverb
vulture	Yes	No	No	No
piranha	Yes	No	No	No

As nouns, vulture and piranha are synonyms defined as:

Other synonyms of vulture include marauder, predator.

vulture (noun)	piranha (noun)
any of various large diurnal birds of prey having naked heads and weak claws and feeding chiefly on carrion	small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals
someone who attacks in search of booty	someone who attacks in search of booty