We don't have synonyms for survivalists yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are survivalist and survivalism.
(n) :
A person who believes in being prepared to survive and is actively preparing for possible future emergencies and disruptions in local, regional, national, or international social or political order.
(n) :
A person who believes in being prepared to survive and is actively preparing for possible future emergencies and disruptions in local, regional, national, or international social or political order.