trope vs metonymy

trope and metonymy both are nouns.

Word	Noun	Adjective	Verb	Adverb
trope	Yes	No	No	No
metonymy	Yes	No	No	No

As nouns, metonymy is a hyponym of trope; that is, metonymy is a word with a more specific, narrower meaning than trope:

trope: language used in a figurative or nonliteral sense
metonymy: substituting the name of an attribute or feature for the name of the thing itself (as in `they counted heads')

trope (noun)	metonymy (noun)
language used in a figurative or nonliteral sense	substituting the name of an attribute or feature for the name of the thing itself (as in `they counted heads')