1. An information processing device, comprising: a base word acquisition unit that acquires a base word to be a base; a compound word acquisition unit that acquires a compound word in which the base word acquired by the base word acquisition unit becomes a modifiee from a compound word storage unit; a classification item acquisition unit that acquires classification items to classify the compound word acquired by the compound word acquisition unit by referring to a classification item storage unit; a feature information acquisition unit that acquires feature information about a feature that provides a clue to classify the compound word acquired by the compound word acquisition unit by referring to a feature information storage unit; a compound word classification unit that distributes the compound word containing the base word into the classification item acquired by the classification item acquisition unit using a classification model generated in advance and the feature information acquired by the feature information acquisition unit for the compound word acquired by the compound word acquisition unit; a base word related information acquisition unit that acquires base word related information containing a plurality of elements related to the base word based on the base word; a base word related information classification unit that classifies each of a portion of the elements contained in the base word related information acquired by the base word related information acquisition unit into one of the classification items in accordance with a classification result by the compound word classification unit; and an output unit that outputs the base word related information classified by the base word related information classification unit.