inhibition vs retardant

inhibition

noun
  • The process of stopping or retarding a reaction. 

  • A recusal. 

  • A writ from a higher court to an inferior judge to stay proceedings. 

  • The act of inhibiting. 

  • A personal feeling of fear or embarrassment that stops one behaving naturally. 

retardant

noun
  • Something that serves to retard (slow down) the action of something 

adj
  • Serving to impede (slow down) the action of something 

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