The best replacement for flem is phlegm.

The best alternatives to flem are rated as following:
★★★★★  phlegm
★★★  mucus
★  yellow flem
★  green flem
  mucous

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

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



Google Trends

Scale is based on the average worldwide traffic of flem in all years. Click on graph for more.
flem
phlegm
mucus