The best replacement for que is cual.

The best alternatives to que are rated as following:
★★★★★  cual
★★★  cue
★★★  qui
★★★  quien
★★  qué
★★  lo que
★★  queue
★  line
★  como
★  porque
  ce que
  que
  dont
  line up
  quienes
  de que
  lo cual
  cual es
  qui french
  mas de
  est-ce que
  el que
  quel
  qual
  ont
  ce qui
  tener que
  signal

Your alternative for que is not listed? Suggest!
Speaking about que, one probably shouldn't forget about an accent.

Other search terms related to que and their ratings are:
★★★★★ an accent
★★★ subjunctive
★★★ day 26
tener
You have in mind a companion for que and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of que in all years. Click on graph for more.
que
cual
cue