The best replacement for dry mouth is thrush.

The best alternatives to dry mouth are rated as following:
★★★★★  thrush
★★★★  thirst
★★  cottonmouth
★★  thick saliva
★★  xerostomia
★  thirsty
★  cotton mouth
★  excessive thirst
  biotene
  tooth decay

Your alternative for dry mouth is not listed? Suggest!
Speaking about dry mouth, one probably shouldn't forget about metallic taste.

Other search terms related to dry mouth and their ratings are:
★★★★★ metallic taste
cpap humidifier
You have in mind a companion for dry mouth and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of dry mouth in all years. Click on graph for more.
dry mouth
thrush
thirst