lackluster vs satisfactory

lackluster

noun
  • A person or thing of no particular brilliance or intelligence. 

  • Lack of brightness or points of interest. 

adj
  • Having no shine or lustre; dull. 

  • Not exceptional; not worthy of special merit, attention, or interest; having no vitality. 

  • Lacking brilliance or intelligence. 

satisfactory

noun
  • Somebody or something that meets requirements without exceeding them. 

  • The rating given to somebody or something that meets requirements without exceeding them. 

adj
  • Causing satisfaction; agreeable or pleasant; satisfying. 

  • Done to satisfaction; adequate or sufficient. 

  • Making atonement for a sin; expiatory. 

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