lowery vs sullen

lowery

adj
  • dark and gloomy; threatening; lowering 

sullen

adj
  • Gloomy; dismal; foreboding. 

  • Having a brooding ill temper; sulky. 

  • Sluggish; slow. 

noun
  • Sullen feelings or manners; sulks; moroseness. 

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