The best replacement for phlegm is mucus.

The best alternatives to phlegm are rated as following:
★★★★★  mucus
★★★★  sputum
★★  mucous
★★  flem
★★  pus
★  green phlegm
★  brown phlegm
★  yellow
★  yellow phlegm
★  spit
  green
  swallow phlegm
  swallow
  saliva
  white phlegm

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

Other search terms related to phlegm and their ratings are:
★★★★★ blood
★★★★★ cough
★★ blood no cough
★★ brown specks
★ blood in the morning
★ coughing
★ little blood
no cough
sore throat
gray specks
asthma
specks
pneumonia
You have in mind a companion for phlegm and it is not yet here? Propose!



Google Trends

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