Is Metonymically a Word?

met′o·nym′i·cal·ly adv.

What does Metonymically meaning in English?

: a figure of speech consisting of the use of the name of one thing for that of another of which it is an attribute or with which it is associated (such as "crown" in "lands belonging to the crown")

Is metonymy the same as synecdoche?

The terms metonymy and synecdoche refer to two similar figures of speech used as rhetorical devices. ... 'Synecdoche' is when a part of something is used to refer to the whole. 'Metonymy' is when something is used to represent something related to it.