The best replacement for mountains is hills.

The best alternatives to mountains are rated as following:
★★★★★  hills
★★★  beach
★★  ocean
★★  rocky mountains
★★  appalachian mountains
★★  beaches
★  volcanoes
★  sea
★  mountain
★  beach essay
★  alps
  appalachian
  smoky mountains
  smokey mountains
  white mountains
  calm clearing
  blue ridge
  canyons
  green mountains
  valleys
  blue ridge mountains
  hunter valley
  plains
  forochel
  new mountains
  appalachians

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

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



Google Trends

Scale is based on the average worldwide traffic of mountains in all years. Click on graph for more.
mountains
hills
beach