yea, you are correct, the" frontierman"word is exist, it means a man who lives on the frontier.

Natasha, Frontiersman (more common) or Frontierman refer to people who live on the frontier. It is not a synonym for borderguard. The words "frontiersman" and "frontierman" can be found in the unabridged Oxford Dictionary. They are chiefly used in the US. American Frontierman Davy Crockett http://viewitem.eim.ebay.ru/American-Frontierman-Davy-Crockett-who-died-at-the-Alamo--Davy-Crockett-stamp/251117370017/item American Frontiersman and Politician Davy Crockett http://www.britannica.com/EBchecked/topic/143670/Davy-Crockett

I have never heard of the word "frontierman", however I think the word "frontiersman" (with an "s") might exist. It sounds old-fashioned though and certainly not in everyday use. It would mean somebody who lives on or near a border. If you are looking for a synonym for border guard, we usually use something like "border security" or "immigration officer".

Yes, "Frontierman" exists. Frontier : The border of a country or the border of a settled country. Frontierman : A dweller on the frontier.

Sorry, synonym for "borderguard".