porcupines vs porcupine ball

porcupines and porcupine ball both are nouns.

Word	Noun	Adjective	Verb	Adverb
porcupines	Yes	No	No	No
porcupine ball	Yes	No	No	No

As nouns, porcupines and porcupine ball are synonyms defined as:

porcupines and porcupine ball: meat patties rolled in rice and simmered in a tomato sauce

porcupines (noun)	porcupine ball (noun)
meat patties rolled in rice and simmered in a tomato sauce	meat patties rolled in rice and simmered in a tomato sauce