The difference between Porcupine and Rodent

When used as nouns, porcupine means any of several rodents of either of the taxonomic families hystricidae (old world porcupines) or erethizontidae (new world porcupines), both from the infraorder hystricognathi, noted for their sharp spines or quills, which are raised when the animal is attacked or surprised, whereas rodent means a mammal of the order rodentia, characterized by long incisors that grow continuously and are worn down by gnawing.

Rodent is also adjective with the meaning: gnawing.

check bellow for the other definitions of Porcupine and Rodent

  1. Porcupine as a noun:

    Any of several rodents of either of the taxonomic families Hystricidae (Old World porcupines) or Erethizontidae (New World porcupines), both from the infraorder Hystricognathi, noted for their sharp spines or quills, which are raised when the animal is attacked or surprised.

  1. Rodent as a noun:

    A mammal of the order Rodentia, characterized by long incisors that grow continuously and are worn down by gnawing.

  2. Rodent as a noun (dated, bulletin board system slang, leet, pejorative):

    A person lacking in maturity, social skills, technical competence or intelligence; lamer.

  1. Rodent as an adjective:

    Gnawing; biting; corroding; applied to a destructive variety of cancer or ulcer.

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