obligate vs whitewash

obligate

verb
  • To commit (money, for example) in order to fulfill an obligation. 

  • To bind, compel, constrain, or oblige by a social, legal, or moral tie. 

  • To cause to be grateful or indebted; to oblige. 

adj
  • Requiring a (specified) way of life, habitat, etc.. 

  • Indispensable; essential; necessary; obligatory; mandatory; unavoidably invoked. 

whitewash

verb
  • To cover over errors or bad actions. 

  • In various games, to defeat (an opponent) so that they fail to score, or to reach a certain point in the game; to skunk. 

  • To paint over with a lime and water mixture so as to brighten up a wall or fence. 

  • To make over (a person or character, a group, an event, etc) so that it is or seems more white, for example by applying makeup to a person, or by discounting the participation of people of color in an event and focusing on only white participation. 

noun
  • The most basic type of thickening agent, flour blended with water to make a paste. 

  • A lime and water mixture for painting walls and fences bright white. 

  • A complete victory or series of victories without suffering any losses; a clean sweep. 

  • A campaign to paper over unfavorable elements. 

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