different vs interchangeable

different

adj
  • Not the same; exhibiting a difference. 

  • Distinct, separate; used for emphasis after numbers and other determiners of quantity. 

  • Various, assorted, diverse. 

  • Unlike most others; unusual. 

adv
  • Differently. 

noun
  • The different ideal. 

interchangeable

adj
  • Following each other in alternate succession; alternating. 

  • Freely substitutable; that may be swapped at will. 

noun
  • Anything that can be interchanged; a substitute. 

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