the following types of metonymy are differentiated:
1. the abstract stands foe the concrete
2. the container is mentioned instead of the contents
3. the material instead of the thing made of it
4. the maker of the thing made
5. the instrument is put for the agent
6. a part is put for the whole (synecdoche)
we need some new faces (metonymy) around here.
his pen (metonymy) is rather sharp (about an author).
he sat just near the cold green eyes (metonymy).