obverse vs two-way

obverse

adj
  • Turned or facing toward the observer. 

  • Corresponding; complementary. 

  • Having the base, or end next to the attachment, narrower than the top. 

noun
  • A proposition obtained by obversion, e.g. All men are mortal => No man is immortal. 

  • The heads side of a coin, or the side of a medal or badge that has the principal design. 

two-way

adj
  • Moving or occurring in opposite directions. 

  • Involving the mutual action or participation of two parties. 

  • Playing both offense and defense in the same game. 

  • Having or involving exactly two variables; bivariate. 

  • Allowing traffic in two directions. 

  • Permitting communication in two directions, i.e. both transmitting and receiving. 

  • Utilising both Western and Indigenous knowledge systems; bothways. 

noun
  • A serving of Cincinnati chili with spaghetti. 

How often have the words obverse and two-way occurred in a corpus of books? (source: Google Ngram Viewer )