porcupine vs hedgehog

porcupine and hedgehog both are nouns.

Word	Noun	Adjective	Verb	Adverb
porcupine	Yes	No	No	No
hedgehog	Yes	No	No	No

As nouns, porcupine and hedgehog are synonyms defined as:

porcupine and hedgehog: relatively large rodents with sharp erectile bristles mingled with the fur

porcupine (noun)	hedgehog (noun)
relatively large rodents with sharp erectile bristles mingled with the fur	small nocturnal Old World mammal covered with both hair and protective spines
	relatively large rodents with sharp erectile bristles mingled with the fur