A metaphor is a figure of speech that compares two unlike things without using the words 'LIKE' or 'AS'. It is often used to make a comparison in order to emphasize a point or to create a vivid IMAGE. A SYMBOL is a thing that stands for or represents something else, usually an idea or concept. A trope is a figure of speech that uses words in a non-literal way, such AS irony or hyperbole. An IMAGE is a mental picture or representation of something, usually created through language or art. All three of these terms are related to metaphor, AS they all involve the use of language to create a comparison or representation of something.