The best replacement for volunteer is employee.

The best alternatives to volunteer are rated as following:
★★★★★  employee
★★★  intern
★★  internship
★★  community service
★★  paid firefighters
★  work experience
★  draft
★  paid
★  career firefighters
★  employee non profit
★  unpaid internship
★  paid ems
★  servant
  donate
  unpaid intern
  not to volunteer
  perform community service
  paid employee
  paid work
  paid staff
  professional firefighters
  conscript
  sullivan north

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

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



Google Trends

Scale is based on the average worldwide traffic of volunteer in all years. Click on graph for more.
volunteer
employee
intern