identical vs monotone

identical

adj
  • Approximating or approaching exact equivalence. 

  • Not different or other; not another or others; not different as regards self; selfsame; numerically identical. 

  • Bearing full likeness by having precisely the same set of characteristics; indistinguishable. 

  • Of twins, sharing the same genetic code. 

  • Exactly equivalent. 

  • For more quotations using this term, see Citations:identical. 

noun
  • Something which has exactly the same properties as something else. 

  • An identical twin. 

monotone

adj
  • Being, or having the salient properties of, a monotone function. 

  • Having a single unvaried pitch. 

verb
  • To speak in a monotone. 

noun
  • A piece of writing in one strain throughout. 

  • A single unvaried tone of speech or a sound. 

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