This document provides examples of how words can function as different parts of speech depending on their meaning and use in a sentence. Specifically, it discusses how the same word can be used as both a noun and an adjective, or as both a noun and a verb. Determining a word's part of speech depends on the sense in which it is used rather than the word itself. The document then provides examples of words functioning as both nouns and adjectives, and nouns and verbs, to illustrate this concept of words having multiple grammatical functions.