The best replacement for firefighter is cop.

The best alternatives to firefighter are rated as following:
★★★★★  cop
★★★★  police officer
★★★  police
★★★  paramedic
★★  fire fighter
★★  fireman
★  emt
★  policeman
★  engineer
★  firefighter
  cops
  electrician
  volunteer firefighter

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

Other search terms related to firefighter and their ratings are:
★★★★★ koala
★★★ guardian angel
★ mickey mouse
★ paramedic
You have in mind a companion for firefighter and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of firefighter in all years. Click on graph for more.
firefighter
cop
police officer