antianxiety vs tranquilizer

antianxiety

noun
  • A medication that combats or reduces anxiety. 

adj
  • Acting to combat or reduce anxiety. 

tranquilizer

noun
  • A drug used to reduce anxiety or tension. 

  • That which tranquillizes or soothes. 

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