reciprocal vs two-way

reciprocal

adj
  • Of a feeling, action or such: mutual, uniformly felt or done by each party towards the other or others; two-way. 

  • Mutually interchangeable. 

  • Expressing mutual action, applied to pronouns and verbs; also in a broad sense: reflexive. 

  • Done, given, felt, or owed in return 

  • Used to denote different kinds of mutual relation; often with reference to the substitution of reciprocals for given quantities. 

noun
  • A construction expressing mutual action. 

  • The number obtained by dividing 1 by another given number; the result of exchanging the numerator and the denominator of a fraction. 

two-way

adj
  • Involving the mutual action or participation of two parties. 

  • Moving or occurring in opposite directions. 

  • 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 reciprocal and two-way occurred in a corpus of books? (source: Google Ngram Viewer )