An anagram is a word formed by rearranging all the letters of another word, using each letter exactly once. These words use every letter from "OPRUPINEC":
Any species of Erethizon and related genera, native of America. They are related to the true porcupines, but have shorter spines, and are arboreal in their habits. The Canada porcupine (Erethizon dorsatus) is a well known species.