The best replacement for plurals is possessives.

The best alternatives to plurals are rated as following:
★★★★★  possessives
  apostrophes

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

Other search terms related to plurals and their ratings are:
★★★★★ apostrophes
★★★ words ending in f
singulars
You have in mind a companion for plurals and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of plurals in all years. Click on graph for more.
plurals
possessives
apostrophes