Geist
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
Ghost
,
apparition
.
noun.
Spirit
(of a group, age, era, etc).
Word Usage
"I've come across the same thing as Addison, that ghost is misconstrued as spectre or phantasm, rather than spirit (interestingly, they're the same word in German, geist, from which I imagine we get the wording)."
suggests
grist