The Handbook of Rhetorical Devices is fascinating. As someone who has always been interested in the workings of language, it is satisfying to read about all the different obscure terms for structures in language.
Reading about these terms can also give us an insight into the ways we use language, and therefore, about how we think:
30. Metonymy is another form of metaphor, very similar to synecdoche, in which the thing chosen for the metaphorical image is closely associated with (but not an actual part of) the subject with which it is to be compared. For example, “The orders came directly from the White House.”