The best replacement for scallion is green onion.

The best alternatives to scallion are rated as following:
★★★★★  green onion
★★★  shallot
★★  onion
★★  leek
★  chive
★  chives
★  spring onion
  leek most like a sweet onion

Your alternative for scallion is not listed? Suggest!

No companions for scallion have been suggested so far.
You have in mind a companion for scallion and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of scallion in all years. Click on graph for more.
green onion