The best replacement for sir is mam.

The best alternatives to sir are rated as following:
★★★★★  mam
★★★  madam
★★  lord
★★  deductible
★★  sir
★★  ma'am
★★  ser
★  dame
★  sire
★  madame
★  mr
★  ma'am military
★  gsr
★  maam
  si
  vti
  madam madame
  mister
  mamm
  mame
  sr
  honda vti
  yes mam
  rs

Your alternative for sir is not listed? Suggest!
Speaking about sir, one probably shouldn't forget about love lulu.

Other search terms related to sir and their ratings are:
★★★★★ love lulu
★★★ love glee
★ sincerely
love-glee
You have in mind a companion for sir and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sir in all years. Click on graph for more.
sir
mam
madam