rain vs water

rain

verb
  • To fall as or like rain. 

  • To have rain fall from the sky. 

  • To issue (something) in large quantities. 

noun
  • Any matter moving or falling, usually through air, and especially if liquid or otherwise figuratively identifiable with raindrops. 

  • Condensed water falling from a cloud. 

  • An instance of particles or larger pieces of matter moving or falling through air. 

water

verb
  • To get or take in water. 

  • To dilute. 

  • To pour water into the soil surrounding (plants). 

  • To urinate onto. 

  • To wet or supply with water; to moisten; to overflow with water; to irrigate. 

  • To fill with or secrete water. 

  • To provide (animals) with water for drinking. 

  • To wet and calender, as cloth, so as to impart to it a lustrous appearance in wavy lines; to diversify with wavelike lines. 

noun
  • The aforementioned liquid, considered one of the Classical elements or basic elements of alchemy. 

  • A solution in water of a gaseous or readily volatile substance. 

  • A serving of liquid water. 

  • A substance (of molecular formula H₂O) found at room temperature and pressure as a clear liquid; it is present naturally as rain, and found in rivers, lakes and seas; its solid form is ice and its gaseous form is steam. 

  • Urine. 

  • The liquid form of this substance: liquid H₂O. 

  • Amniotic fluid or the amniotic sac containing it. (Used only in the plural in the UK but often also in the singular in North America.) 

  • Fluids in the body, especially when causing swelling. 

  • Water in a body; an area of open water. 

  • A state of affairs; conditions; usually with an adjective indicating an adverse condition. 

  • A person's intuition. 

  • The limpidity and lustre of a precious stone, especially a diamond. 

  • A wavy, lustrous pattern or decoration such as is imparted to linen, silk, metals, etc. 

  • Spa water. 

  • Mineral water. 

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