reserve vs reservoir

reserve

verb
  • To keep in store for future or special use. 

  • To keep back; to retain. 

  • To book in advance; to make a reservation. 

noun
  • A reserve price in an auction. 

  • Wine held back and aged before being sold. 

  • A body of troops kept in the rear of an army drawn up for battle, reserved to support the other lines as occasion may require; a force or body of troops kept for an exigency. 

  • Absence of color or decoration; the state of being left plain. 

  • The act of reserving or keeping back; reservation; exception. 

  • A tract of land reserved, or set apart, for a particular purpose 

  • A resist. 

  • Restraint of freedom in words or actions; backwardness; caution in personal behavior. 

  • A preparation used on an object being electroplated to fix the limits of the deposit. 

  • In exhibitions, a distinction indicating that the recipient will get a prize in the event of another person being disqualified. 

  • A member of a team who does not participate from the start of the game, but can be used to replace tired or injured team-mates. 

  • A tract of land set apart for the use of an Aboriginal group; Indian reserve (compare US reservation.) 

  • Funds kept on hand to meet planned or unplanned financial requirements. 

  • A group or pile of cards dealt out at the beginning of a patience or solitaire game to be used during play. 

  • A natural resource known to exist but not currently exploited. 

reservoir

verb
  • To store or keep (something) in or as in a reservoir. 

noun
  • A species that acts as host to a zoonosis when it is not causing acute illness in other susceptible species. 

  • A "black box" component that receives an input signal to be read out and mapped by another process, as part of reservoir computing. 

  • A small intercellular space, often containing resin, essential oil, or some other secreted matter. 

  • A supply or source of something. 

  • A large natural or artificial lake used as a source of water supply. 

  • A place where anything is kept in store. 

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