text: A metaphor is more forceful ( active ) than an analogy , because metaphor asserts two things are the same , whereas analogy implies a difference ; other rhetorical comparative figures of speech , such as metonymy , parable , simile and synecdoche , are species of metaphor distinguished by how the comparison is communicated . The metaphor category also contains these specialised types :
simplified: A simple metaphor is also known as a tight metaphor .