The best replacement for impedance is resistance.

The best alternatives to impedance are rated as following:
★★★★★  resistance
★★  reactance
★  inductance
★  high impedance
★  admittance
★  esr
★  low impedance
★  impedance
★  frequency capacitor
★  sound quality
  resistance difference
  high impedance injectors
  capacitance
  low esr
  thermal resistance
  ph probe
  low
  attenuation
  speaker impedance
  low injectors
  load impedance

Your alternative for impedance is not listed? Suggest!
Speaking about impedance, one probably shouldn't forget about esophageal manometry.

Other search terms related to impedance and their ratings are:
★★★★★ esophageal manometry
★★★ ohms law
You have in mind a companion for impedance and it is not yet here? Propose!



Google Trends

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impedance
resistance
reactance