decline vs reducer

decline

noun
  • A reduction or diminution of activity. 

  • A weakening. 

  • Downward movement, fall. 

  • The act of declining or refusing something. 

  • A sloping downward, e.g. of a hill or road. 

verb
  • To choose not to do something; refuse, forbear, refrain. 

  • To run through from first to last; to recite in order as though declining a noun. 

  • To cause to decrease or diminish. 

  • To bend downward; to bring down; to depress; to cause to bend, or fall. 

  • To turn or bend aside; to deviate; to stray; to withdraw. 

  • To move downwards, to fall, to drop. 

  • To inflect for case, number, gender, and the like. 

  • To reject a penalty against the opposing team, usually because the result of accepting it would benefit the non-penalized team less than the preceding play. 

  • To become weaker or worse. 

  • To recite all the different declined forms of (a word). 

reducer

noun
  • Something that reduces. 

  • A reducing agent. 

  • A liquid used in the process of developing a negative to reduce its darkness. 

  • A function that takes state and action as arguments and returns the next state of the app. 

  • A hydraulic device for reducing pressure and hence increasing movement, used to transmit the load from the hydraulic support of the lower shackle to the lever weighing apparatus in some kinds of heavy testing machine. 

  • A component used to connect two pipes of different bores. 

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