ameliorative vs effective

ameliorative

adj
  • Suggesting or relating to a positive or approving evaluation. 

  • Of or relating to conceptual engineering, the normative study of which conceptual demarcation is most conducive to solve the problems the concept is a priori taken to solve. 

  • Able to repair or ameliorate. 

noun
  • A linguistic unit (such as a word, morpheme) that implies a positive or approving evaluation. 

  • That which betters or improves. 

effective

adj
  • Producing a decided or decisive effect. 

  • approximate; Not describing the fundamental dynamic changes in some system as they happen. 

  • Efficient, serviceable, or operative, available for useful work. 

  • Having no negative coefficients. 

  • Having the power to produce a required effect or effects. 

  • Actually in effect. 

noun
  • a soldier fit for duty 

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