The correct way to write this is firefighter. So your answer is one word.
It is often debated to be two words, especially in some minority areas of North America. However this is incorrect, according to official English dictionaries, where it is listed as one word.
Dictionary sources:
"Firefighter" is one word, also commonly known as a "fireman" although they can be male or female. He or she is a rescuer extensively trained in firefighting.
Two.
it can take anywhere form one to two years
Firefighting is a job about fighting fires it says it in the name
basicly its a water hose. a really big one
firefighting 101
A Firefighting We Will Go was created on 1999-01-10.
Yeah okay. firefighting has been around for many years,
It is called firefighting equipment steel cabinet. :)
There is no similarity between vapor density and firefighting - one is a measure of the density of a gas or vapour relative to another (often Hydrogen or air) and the other is heroic job.
no it is not an one word it is of two word
I think the word "ongoing" is only one word, but it has two syllables that are two separate words.
One word, two syllables
It is one word.