Generic terms and copyright
While copyrighting/trademarking a propper noun for a character makes sense, what about words like vampire, surrogate and droid? Words which encapsulate and communicate a specific idea very well, but, due to increasingly litigious creative culture, some can't be used freely.
For instance, if I'm writing some sci-fi, and have a character who regularly uses a remote body, should I stick to the off-brand "Remote body." or go with "Surrogate." the term that already carries with it the necessary connotations?
Also, how can we establish understood off-brand nouns i.e. coming up with a name and expressing specific intent that it can be used freely?