I am looking for a noun meaning "survivor". It looks like the closest in meaning is the adjective superstes. Can that be used as a noun, and if so how do you decline it? Per the post on deriving nouns from adjectives, it seems like there were a several ways to go about it.
Additionally, is there another adjective that would mean something like one who has survived / they who have survived, or is there a noun that already has this meaning?