import vs substance

import

noun
  • Significance, importance. 

  • The practice of importing. 

  • Something brought in from an exterior source, especially for sale or trade. 

  • A foreigner playing in a sports league. 

verb
  • To be incumbent on (someone to do something). 

  • To mean, signify. 

  • To be important; to be significant; to be of consequence. 

  • To load a file into a software application from another version or system. 

  • To bring (something) in from a foreign country, especially for sale or trade. 

  • To be important or crucial to (that something happen). 

  • To be of importance to (someone or something). 

substance

noun
  • The essential part of anything; the most vital part. 

  • Physical matter; material. 

  • Material possessions; estate; property; resources. 

  • Hypostasis. 

  • Drugs (illegal narcotics) 

  • Substantiality; solidity; firmness. 

  • A form of matter that has constant chemical composition and characteristic properties. 

verb
  • To give substance to; to make real or substantial. 

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