twin cities

/T W IH1 N S IH1 T IY0 Z/
noun
  1. 1

    One of two cities in close proximity to each other.

    โ€œTexarkana, Arkansas, and Texarkana, Texas, are twin cities forming the Texarkana metropolitan area.โ€

  2. 2

    A city that has been twinned with another more distant city.

Source: https://en.wiktionary.org/wiki/twin%20cities, https://en.wiktionary.org/wiki/twin%20city