piranha vs pirana

piranha and pirana both are nouns.

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

As nouns, piranha and pirana are synonyms defined as:

piranha and pirana: small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals

Other synonyms of piranha include caribe.

piranha (noun)	pirana (noun)
small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals	small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals
someone who attacks in search of booty