A metaphor is generally considered to be more forceful and active than an [[analogy]] (metaphor asserts two topics are the same whereas analogy may acknowledge differences). Other rhetorical devices involving comparison, such as [[metonym]], [[synecdoche]], [[simile]], [[allegory]] and [[parable]], share much in common with metaphor but are usually distinguished by the manner in which the comparison between subjects is delivered. | A metaphor is generally considered to be more forceful and active than an [[analogy]] (metaphor asserts two topics are the same whereas analogy may acknowledge differences). Other rhetorical devices involving comparison, such as [[metonym]], [[synecdoche]], [[simile]], [[allegory]] and [[parable]], share much in common with metaphor but are usually distinguished by the manner in which the comparison between subjects is delivered. |