porcupine vs rodent

porcupine and rodent both are nouns.

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

As nouns, rodent is a hypernym of porcupine; that is, rodent is a word with a broader meaning than porcupine:

porcupine: relatively large rodents with sharp erectile bristles mingled with the fur
rodent: relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Other hypernyms of porcupine include gnawer.

porcupine (noun)	rodent (noun)
relatively large rodents with sharp erectile bristles mingled with the fur	relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing