Synonyms for Hedgehog (same or very similar meaning)
WordNet sense 1 (relatively large rodents with sharp erectile bristles mingled with the fur):
porcupineWordNet sense 2 (small nocturnal Old World mammal covered with both hair and protective spines):
Erinaceus europaeus, Erinaceus europeaeusFrom the ODE community, based on WordNetadd/edit