synecdoche vs synecdochic

synecdoche is a noun but synecdochic is not a noun.

Word	Noun	Adjective	Verb	Adverb
synecdoche	Yes	No	No	No
synecdochic	No	Yes	No	No

synecdoche (noun)	synecdochic (noun)
substituting a more inclusive term for a less inclusive one or vice versa

synecdoche (adjective)	synecdochic (adjective)
	using the name of a part for that of the whole or the whole for the part; or the special for the general or the general for the special; or the material for the thing made of it