The best replacement for smiling is frowning.

The best alternatives to smiling are rated as following:
★★★★★  frowning
★★★  frowning muscles
★★  smiling
★  frowning take more muscles
★  grinning
★  snarling
  frowning muscles used
  smirking
  not smiling

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

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



Google Trends

Scale is based on the average worldwide traffic of smiling in all years. Click on graph for more.
smiling
frowning
frowning muscles