higher-order vs intelligent

higher-order

adj
  • Involving more sophisticated thinking or reasoning. 

  • Of or relating to a class higher up in a hierarchy. 

intelligent

adj
  • Well thought-out, well considered. 

  • Having an environment-sensing automatically-invoked built-in computer capability. 

  • Characterized by thoughtful interaction. 

  • Having at least a similar level of brain power to humankind. 

  • Of high or especially quick cognitive capacity, bright. 

How often have the words higher-order and intelligent occurred in a corpus of books? (source: Google Ngram Viewer )