precipitate vs retard

precipitate

verb
  • To act too hastily; to be precipitous. 

  • To separate a substance out of a liquid solution into solid form. 

  • To throw an object or person from a great height. 

  • To send violently into a certain state or condition. 

  • To make something happen suddenly and quickly. 

  • To come out of a liquid solution into solid form. 

  • To have water in the air fall to the ground, for example as rain, snow, sleet, or hail; be deposited as condensed droplets. 

  • To cause (water in the air) to condense or fall to the ground. 

  • To fall headlong. 

adj
  • With a hasty impulse; hurried; headstrong. 

  • Moving with excessive speed or haste; overly hasty. 

  • headlong; falling steeply or vertically. 

  • Performed very rapidly or abruptly. 

  • Very steep; precipitous. 

noun
  • a solid that exits the liquid phase of a solution 

  • a product resulting from a process, event, or course of action 

retard

verb
  • To put off; to postpone. 

  • To decelerate; to slow down. 

  • To keep delaying; to continue to hinder; to prevent from progressing. 

noun
  • Retardation; delay. 

  • A slowing down of the tempo; a ritardando. 

  • A person or being who is extremely stupid or slow to learn. 

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