The best replacement for cab is taxi.

The best alternatives to cab are rated as following:
★★★★★  taxi
★★★★  merlot
★★★  extended cab
★★★  crew cab
★★★  abc
★★  pinot noir
★★  quad cab
★★  msi
★  double cab
★  super crew
★  zin
★  super cab
★  cure
★  taxi difference
★  club cab
★  pinot
★  supercrew
★  uber
★  mega cab
  supercab
  shiraz
  ccb
  exe
  cib
  cccs
  supercrew cab
  ford crew cab
  combo
  king cab
  yellow cab
  syrah
  crew max
  2000 gmc extended cab

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

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



Google Trends

Scale is based on the average worldwide traffic of cab in all years. Click on graph for more.
cab
taxi
merlot