The best replacement for cliff is bluff.

The best alternatives to cliff are rated as following:
★★★★★  bluff
★★  clift
★★  norm
★★  jason
★★  cliff
★  lancaster
★  escarpment
★  dallastown
★  stock market
★  addeboy
★  bishop mcdevitt
★  pleasant grove
★  ledge
★  debt ceiling
★  wylie
  red land
  sequestration
  sequester
  seagoville

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

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



Google Trends

Scale is based on the average worldwide traffic of cliff in all years. Click on graph for more.
cliff
bluff
clift