piranha vs predator

piranha and predator both are nouns.

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

As nouns, piranha and predator are synonyms defined as:

Other synonyms of piranha include marauder, vulture.

piranha (noun)	predator (noun)
small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals	any animal that lives by preying on other animals
someone who attacks in search of booty	someone who attacks in search of booty