Washington is a metonym for the United States government.
plastic is a metonym for credit card.
Examples of metonym
metonym
Smith Hill is sometimes used as a metonym for the Rhode Island General Assembly.
From the en.wikipedia.org
Metonym miscommunication is considered a primary mechanism of linguistic humour.
From the en.wikipedia.org
Metonymy has never appeared in my database but its back-formation METONYM has.
From the wordplay.blogs.nytimes.com
Climate change has become a great metonym for industrialisation with no name.
From the independent.co.uk
As Roy Hattersley came to know its very name is a playground metonym for fat.
From the guardian.co.uk
He became known as Peeping Tom thus originating a new idiom, or metonym, in English.
From the en.wikipedia.org
Whitehall-a metonym for the British government's administrative centre-has frustrated others.
From the economist.com
Wiglaf is called Scylfing as a metonym for Swede, as the Scylfings were the ruling Swedish clan.
From the en.wikipedia.org
In English it is a metonym that means various parts of Asia.
From the en.wikipedia.org
More examples
A word that denotes one thing but refers to a related thing; "Washington is a metonym for the United States government"; "plastic is a metonym for credit card"
(metonymic) using the name of one thing for that of another with which it is closely associated; "to say `he spent the evening reading Shakespeare' is metonymic because it substitutes the author himself for the author's works"
Metonymy is a figure of speech used in rhetoric in which a thing or concept is not called by its own name, but by the name of something intimately associated with that thing or concept. ...
A word that names an object from a single characteristic of it or of a closely related object; A word used in metonymy
Ideogram showing cause for effect or effect for cause (a tool represents the object produced, the moon is a month), Champollion's second category of Egyptian hieroglyphs.
Any specific use or specific example of metonymy, or any symbol in which a specific physical object is used as a vague suggestive symbol for a more general idea. See metonymy below.
An allusion to a subject through the representation of something related to it or a part of it.
Where an associated detail is used to represent an object or idea eg: a crown is used to represent a king/queen.
A word used in a transferred sense, e.g. "the bottle" for "drink".