endgame vs permanent

endgame

noun
  • The final stage of a game of bridge, when there are few cards left. 

  • The final stage of a game of chess, when there are few pieces left. 

  • The final stage of any game. 

  • The final stage of an extended process or course of events, especially with the implication of the imminent realization of a masterful strategy or plan. 

  • The gameplay available in a massively multiplayer online role-playing game for players who have completed all of the preset challenges. 

adj
  • Having become canon by the end of the plot of a work of fiction or speculated to be intended to become such. 

permanent

noun
  • A card whose effects persist beyond the turn on which it is played. 

  • A chemical hair treatment imparting or removing curliness, whose effects typically last for a period of weeks; a perm. 

  • Given an n⨯n matrix a_ij,, the sum over all permutations 𝜋, of ∏ᵢ₌₁ⁿa_i𝜋(i). 

adj
  • Without end, eternal. 

  • Lasting for an indefinitely long time. 

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