encouraging vs promising

encouraging

adj

  • giving courage, confidence or hope 

  • supporting by giving encouragement 

  • auspicious, or bringing good luck 

noun

  • encouragement 

promising

adj

  • Encouraging and inspiring confidence. 

  • Showing promise, and likely to develop in a desirable fashion. 

  • a promising young apprentice 

noun

  • The act of making a promise. 

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