equivalence vs metonym

equivalence

noun
  • The degree to which a term or text in one language is semantically similar to its translated counterpart. 

  • The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valency. 

  • A number in intersection theory. A positive-dimensional variety sometimes behaves formally as if it were a finite number of points; this number is its equivalence. 

  • An equivalence relation; ≡; ~ 

  • A Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function. 

  • The condition of being equivalent or essentially equal. 

  • The relationship between two propositions that are either both true or both false. 

verb
  • To be equivalent or equal to; to counterbalance. 

metonym

noun
  • A word that names an object from a single characteristic of it or of a closely related object; a word used in metonymy. 

  • A concept, idea, or word used to represent, typify, or stand in for a broader set of ideas. 

How often have the words equivalence and metonym occurred in a corpus of books? (source: Google Ngram Viewer )