The best replacement for coupling is cohesion.

The best alternatives to coupling are rated as following:
★★★★★  cohesion
★★★★  repulsion
★★★★  union
★★★  friends
★★  decoupling
★★  dc coupling
★  bushing
★  full coupling
★  ac coupling
  cohesion java
  tight coupling
  hooke s coupling
  vfd
  coupler
  connector
  torque converter
  sleeve
  capacitive coupling
  speed coupling
  half coupling

Your alternative for coupling is not listed? Suggest!
Speaking about coupling, one probably shouldn't forget about flange.

Other search terms related to coupling and their ratings are:
★★★★★ flange
★★★★★ brake drum
You have in mind a companion for coupling and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of coupling in all years. Click on graph for more.
coupling
cohesion
repulsion