droop vs precipitate

droop

verb
  • To hang downward; to sag. 

  • To lose all energy, enthusiasm or happiness; to flag. 

  • To slowly become limp; to bend gradually. 

  • To proceed downward, or toward a close; to decline. 

  • To allow to droop or sink. 

noun
  • A condition or posture of drooping. 

  • A hinged portion of the leading edge of an aeroplane's wing, which swivels downward to increase lift during takeoff and landing. 

  • Something which is limp or sagging. 

precipitate

verb
  • To fall headlong. 

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

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

  • To act too hastily; to be precipitous. 

  • 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. 

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 

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